[libsigrokdecode.git] / controller.c

/*
 * This file is part of the sigrok project.
 *
 * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
 * Copyright (C) 2011 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 "config.h"
#include <sigrokdecode.h> /* First, so we avoid a _POSIX_C_SOURCE warning. */
#include <glib.h>

/* TODO: this should probably be in sigrokdecode.h */
/* Re-define some string functions for Python >= 3.0. */
#if PY_VERSION_HEX >= 0x03000000
#define PyString_AsString PyBytes_AsString
#define PyString_FromString PyBytes_FromString
#define PyString_Check PyBytes_Check
#endif


/* TODO
static GSList *pipelines = NULL;
*/

/* lives in decoder.c */
extern GSList *pd_list;
extern GSList *di_list;

struct srd_pipeline {
	int id;
	GSList *decoders;
};


static PyObject *Decoder_init(PyObject *self, PyObject *args)
{
	(void)self;
	(void)args;
//	printf("init object %x\n", self);

	Py_RETURN_NONE;
}

struct srd_decoder_instance *get_di_by_decobject(void *decobject);

static PyObject *Decoder_put(PyObject *self, PyObject *args)
{
	GSList *l;
	PyObject *data;
	struct srd_decoder_instance *di;
	struct srd_pd_output *pdo;
	int output_id;

	if (!(di = get_di_by_decobject(self)))
		return NULL;

	printf("put: %s instance %x: ", di->decoder->name, (unsigned int) di);

	if (!PyArg_ParseTuple(args, "iO", &output_id, &data))
		return NULL;

	if (!(l = g_slist_nth(di->pd_output, output_id)))
		/* PD supplied invalid output id */
		/* TODO: better error message */
		return NULL;
	pdo = l->data;

	printf("output type %d: ", pdo->output_type);
	PyObject_Print(data, stdout, Py_PRINT_RAW);
	puts("");

	Py_RETURN_NONE;
}


static PyObject *Decoder_output_new(PyObject *self, PyObject *py_output_type)
{
	PyObject *ret;
	struct srd_decoder_instance *di;
	char *protocol_id, *description;
	int output_type, pdo_id;

	if (!(di = get_di_by_decobject(self)))
		return NULL;

	printf("output_new di %s\n", di->decoder->name);

//	if (!PyArg_ParseTuple(args, "i:output_type,s:protocol_id,s:description",
//			&output_type, &protocol_id, &description))
	if (!PyArg_ParseTuple(py_output_type, "i:output_type", &output_type))
		return NULL;

	protocol_id = "i2c";
	description = "blah";
	pdo_id = pd_output_new(di, output_type, protocol_id, description);
	if (pdo_id < 0)
		Py_RETURN_NONE;
	else
		ret = Py_BuildValue("i", pdo_id);

	return ret;
}

static PyMethodDef no_methods[] = { {NULL, NULL, 0, NULL} };
static PyMethodDef Decoder_methods[] = {
	{"__init__", Decoder_init, METH_VARARGS, ""},
	{"put", Decoder_put, METH_VARARGS,
	 "Accepts a dictionary with the following keys: time, duration, data"},
	{"output_new", Decoder_output_new, METH_VARARGS,
	 "Create a new output stream"},
	{NULL, NULL, 0, NULL}
};


typedef struct {
	PyObject_HEAD
} sigrok_Decoder_object;

static PyTypeObject sigrok_Decoder_type = {
	PyObject_HEAD_INIT(NULL)
	.tp_name = "sigrok.Decoder",
	.tp_basicsize = sizeof(sigrok_Decoder_object),
	.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
	.tp_doc = "Sigrok Decoder object",
	.tp_methods = Decoder_methods,
};

PyMODINIT_FUNC init_sigrok_Decoder(void)
{
	PyObject *mod;

	/* assign this here, for compiler portability */
	sigrok_Decoder_type.tp_new = PyType_GenericNew;
	if (PyType_Ready(&sigrok_Decoder_type) < 0)
		return;

	mod = Py_InitModule3("sigrok", no_methods, "sigrok base classes");
	Py_INCREF(&sigrok_Decoder_type);
	PyModule_AddObject(mod, "Decoder", (PyObject *)&sigrok_Decoder_type);

}


struct srd_decoder_instance *get_di_by_decobject(void *decobject)
{
	GSList *l;
	struct srd_decoder_instance *di;

	for (l = di_list; l; l = l->next) {
		di = l->data;
		if (decobject == di->py_instance)
			return di;
	}

	return NULL;
}

/**
 * Initialize libsigrokdecode.
 *
 * This initializes the Python interpreter, and creates and initializes
 * a "sigrok" Python module with a single put() method.
 *
 * Then, it searches for sigrok protocol decoder files (*.py) in the
 * "decoders" subdirectory of the the sigrok installation directory.
 * All decoders that are found are loaded into memory and added to an
 * internal list of decoders, which can be queried via srd_list_decoders().
 *
 * The caller is responsible for calling the clean-up function srd_exit(),
 * which will properly shut down libsigrokdecode and free its allocated memory.
 *
 * Multiple calls to srd_init(), without calling srd_exit() inbetween,
 * are not allowed.
 *
 * @return SRD_OK upon success, a (negative) error code otherwise.
 *         Upon Python errors, return SRD_ERR_PYTHON. If the sigrok decoders
 *         directory cannot be accessed, return SRD_ERR_DECODERS_DIR.
 *         If not enough memory could be allocated, return SRD_ERR_MALLOC.
 */
int srd_init(void)
{
	int ret;

	/* Py_Initialize() returns void and usually cannot fail. */
	Py_Initialize();

	init_sigrok_Decoder();

	PyRun_SimpleString("import sys;");
	if ((ret = set_modulepath()) != SRD_OK) {
		Py_Finalize();
		return ret;
	}

	if ((ret = srd_load_all_decoders()) != SRD_OK) {
		Py_Finalize();
		return ret;
	}

	return SRD_OK;
}


/**
 * Shutdown libsigrokdecode.
 *
 * This frees all the memory allocated for protocol decoders and shuts down
 * the Python interpreter.
 *
 * This function should only be called if there was a (successful!) invocation
 * of srd_init() before. Calling this function multiple times in a row, without
 * any successful srd_init() calls inbetween, is not allowed.
 *
 * @return SRD_OK upon success, a (negative) error code otherwise.
 */
int srd_exit(void)
{
	/* Unload/free all decoders, and then the list of decoders itself. */
	/* TODO: Error handling. */
	srd_unload_all_decoders();
	g_slist_free(pd_list);

	/* Py_Finalize() returns void, any finalization errors are ignored. */
	Py_Finalize();

	return SRD_OK;
}


/**
 * Add search directories for the protocol decoders.
 *
 * TODO: add path from env var SIGROKDECODE_PATH, config etc
 */
int set_modulepath(void)
{
	int ret;

	ret = PyRun_SimpleString("sys.path.append(r'" DECODERS_DIR "');");

	return ret;
}


struct srd_decoder_instance *srd_instance_new(const char *id)
{
	struct srd_decoder *dec;
	struct srd_decoder_instance *di;
	PyObject *py_args;

	fprintf(stdout, "%s: %s\n", __func__, id);

	if (!(dec = srd_get_decoder_by_id(id)))
		return NULL;

	/* TODO: Error handling. Use g_try_malloc(). */
	di = g_malloc(sizeof(*di));
	di->decoder = dec;
	di->pd_output = NULL;

	/* Create an empty Python tuple. */
	if (!(py_args = PyTuple_New(0))) { /* NEWREF */
		if (PyErr_Occurred())
			PyErr_Print(); /* Returns void. */

		return NULL; /* TODO: More specific error? */
	}

	/* Create an instance of the 'Decoder' class. */
	di->py_instance = PyObject_Call(dec->py_decobj, py_args, NULL);
	if (!di->py_instance) {
		if (PyErr_Occurred())
			PyErr_Print(); /* Returns void. */
		Py_XDECREF(py_args);
		return NULL; /* TODO: More specific error? */
	}
	di_list = g_slist_append(di_list, di);

	Py_XDECREF(py_args);

	return di;
}


int srd_instance_set_probe(struct srd_decoder_instance *di,
			   const char *probename, int num)
{
	PyObject *probedict, *probenum;

	probedict = PyObject_GetAttrString(di->py_instance, "probes"); /* NEWREF */
	if (!probedict) {
		if (PyErr_Occurred())
			PyErr_Print(); /* Returns void. */

		return SRD_ERR_PYTHON; /* TODO: More specific error? */
	}

	probenum = PyInt_FromLong(num);
	PyMapping_SetItemString(probedict, (char *)probename, probenum);

	Py_XDECREF(probenum);
	Py_XDECREF(probedict);

	return SRD_OK;
}


int srd_session_start(const char *driver, int unitsize, uint64_t starttime,
		uint64_t samplerate)
{
	PyObject *py_res;
	GSList *d;
	struct srd_decoder_instance *di;

	fprintf(stdout, "%s: %s\n", __func__, driver);

	for (d = di_list; d; d = d->next) {
		di = d->data;
		if (!(py_res = PyObject_CallMethod(di->py_instance, "start",
					"{s:s,s:l,s:l,s:l}",
					"driver", driver,
					"unitsize", (long)unitsize,
					"starttime", (long)starttime,
					"samplerate", (long)samplerate))) {
			if (PyErr_Occurred())
				PyErr_Print(); /* Returns void. */

			return SRD_ERR_PYTHON; /* TODO: More specific error? */
		}
		Py_XDECREF(py_res);
	}

	return SRD_OK;
}


/**
 * Run the specified decoder function.
 *
 * @param dec TODO
 * @param inbuf TODO
 * @param inbuflen TODO
 *
 * @return SRD_OK upon success, a (negative) error code otherwise.
 */
int srd_run_decoder(struct srd_decoder_instance *dec,
		    uint8_t *inbuf, uint64_t inbuflen)
{
	PyObject *py_instance, *py_res;
	/* FIXME: Don't have a timebase available here. Make one up. */
	static int _timehack = 0;

	_timehack += inbuflen;

//	fprintf(stdout, "%s: %s\n", __func__, dec->decoder->name);

	/* Return an error upon unusable input. */
	if (dec == NULL)
		return SRD_ERR_ARG; /* TODO: More specific error? */
	if (inbuf == NULL)
		return SRD_ERR_ARG; /* TODO: More specific error? */
	if (inbuflen == 0) /* No point in working on empty buffers. */
		return SRD_ERR_ARG; /* TODO: More specific error? */

	/* TODO: Error handling. */
	py_instance = dec->py_instance;
	Py_XINCREF(py_instance);

	if (!(py_res = PyObject_CallMethod(py_instance, "decode",
					   "{s:i,s:i,s:s#}",
					   "time", _timehack,
					   "duration", 10,
					   "data", inbuf, inbuflen))) { /* NEWREF */
		if (PyErr_Occurred())
			PyErr_Print(); /* Returns void. */

		return SRD_ERR_PYTHON; /* TODO: More specific error? */
	}

	Py_XDECREF(py_res);
	return SRD_OK;
}


/* Feed logic samples to decoder session. */
int srd_session_feed(uint8_t *inbuf, uint64_t inbuflen)
{
	GSList *d;
	int ret;

//	fprintf(stdout, "%s: %d bytes\n", __func__, inbuflen);

	for (d = di_list; d; d = d->next) {
		if ((ret = srd_run_decoder(d->data, inbuf, inbuflen)) != SRD_OK)
			return ret;
	}

	return SRD_OK;
}


int pd_output_new(struct srd_decoder_instance *di, int output_type,
		char *protocol_id, char *description)
{
	GSList *l;
	struct srd_pd_output *pdo;
	int pdo_id;

	fprintf(stdout, "%s: output type %d, protocol_id %s, description %s\n",
			__func__, output_type, protocol_id, description);

	pdo_id = -1;
	for (l = di->pd_output; l; l = l->next) {
		pdo = l->data;
		if (pdo->pdo_id > pdo_id)
			pdo_id = pdo->pdo_id;
	}
	pdo_id++;

	if (!(pdo = g_try_malloc(sizeof(struct srd_pd_output))))
		return -1;

	pdo->pdo_id = pdo_id;
	pdo->output_type = output_type;
	pdo->protocol_id = g_strdup(protocol_id);
	pdo->description = g_strdup(description);
	di->pd_output = g_slist_append(di->pd_output, pdo);

	return pdo_id;
}


//int srd_pipeline_new(int plid)
//{
//
//
//}
Commit	Line	Data
b2c19614 BV	1	/*
	2	* This file is part of the sigrok project.
	3	*
	4	* Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
	5	* Copyright (C) 2011 Bert Vermeulen <bert@biot.com>
	6	*
	7	* This program is free software: you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation, either version 3 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	19	*/
	20
	21	#include "config.h"
	22	#include <sigrokdecode.h> /* First, so we avoid a _POSIX_C_SOURCE warning. */
	23	#include <glib.h>
	24
	25	/* TODO: this should probably be in sigrokdecode.h */
	26	/* Re-define some string functions for Python >= 3.0. */
	27	#if PY_VERSION_HEX >= 0x03000000
	28	#define PyString_AsString PyBytes_AsString
	29	#define PyString_FromString PyBytes_FromString
	30	#define PyString_Check PyBytes_Check
	31	#endif
	32
	33
e5080882	34	/* TODO
b2c19614	35	static GSList *pipelines = NULL;
e5080882	36	*/
b2c19614 BV	37
b2c19614 BV	38	/* lives in decoder.c */
e5080882 BV	39	extern GSList *pd_list;
e5080882 BV	40	extern GSList *di_list;
b2c19614 BV	41
	42	struct srd_pipeline {
	43	int id;
	44	GSList *decoders;
	45	};
	46
	47
	48
	49	static PyObject Decoder_init(PyObject self, PyObject *args)
	50	{
	51	(void)self;
	52	(void)args;
	53	// printf("init object %x\n", self);
	54
	55	Py_RETURN_NONE;
	56	}
	57
e5080882	58	struct srd_decoder_instance get_di_by_decobject(void decobject);
b2c19614 BV	59
	60	static PyObject Decoder_put(PyObject self, PyObject *args)
	61	{
e5080882 BV	62	GSList *l;
	63	PyObject *data;
	64	struct srd_decoder_instance *di;
	65	struct srd_pd_output *pdo;
	66	int output_id;
	67
	68	if (!(di = get_di_by_decobject(self)))
	69	return NULL;
b2c19614	70
e5080882 BV	71	printf("put: %s instance %x: ", di->decoder->name, (unsigned int) di);
	72
	73	if (!PyArg_ParseTuple(args, "iO", &output_id, &data))
	74	return NULL;
b2c19614	75
e5080882 BV	76	if (!(l = g_slist_nth(di->pd_output, output_id)))
	77	/* PD supplied invalid output id */
	78	/* TODO: better error message */
b2c19614	79	return NULL;
e5080882	80	pdo = l->data;
b2c19614	81
e5080882 BV	82	printf("output type %d: ", pdo->output_type);
e5080882 BV	83	PyObject_Print(data, stdout, Py_PRINT_RAW);
b2c19614 BV	84	puts("");
	85
	86	Py_RETURN_NONE;
	87	}
	88
e5080882 BV	89
	90	static PyObject Decoder_output_new(PyObject self, PyObject *py_output_type)
	91	{
	92	PyObject *ret;
	93	struct srd_decoder_instance *di;
	94	char protocol_id, description;
	95	int output_type, pdo_id;
	96
	97	if (!(di = get_di_by_decobject(self)))
	98	return NULL;
	99
	100	printf("output_new di %s\n", di->decoder->name);
	101
	102	// if (!PyArg_ParseTuple(args, "i:output_type,s:protocol_id,s:description",
	103	// &output_type, &protocol_id, &description))
	104	if (!PyArg_ParseTuple(py_output_type, "i:output_type", &output_type))
	105	return NULL;
	106
	107	protocol_id = "i2c";
	108	description = "blah";
	109	pdo_id = pd_output_new(di, output_type, protocol_id, description);
	110	if (pdo_id < 0)
	111	Py_RETURN_NONE;
	112	else
	113	ret = Py_BuildValue("i", pdo_id);
	114
	115	return ret;
	116	}
	117
b2c19614 BV	118	static PyMethodDef no_methods[] = { {NULL, NULL, 0, NULL} };
	119	static PyMethodDef Decoder_methods[] = {
	120	{"__init__", Decoder_init, METH_VARARGS, ""},
	121	{"put", Decoder_put, METH_VARARGS,
	122	"Accepts a dictionary with the following keys: time, duration, data"},
e5080882 BV	123	{"output_new", Decoder_output_new, METH_VARARGS,
e5080882 BV	124	"Create a new output stream"},
b2c19614 BV	125	{NULL, NULL, 0, NULL}
	126	};
	127
	128
b2c19614 BV	129	typedef struct {
	130	PyObject_HEAD
	131	} sigrok_Decoder_object;
	132
	133	static PyTypeObject sigrok_Decoder_type = {
	134	PyObject_HEAD_INIT(NULL)
6547acfd GM	135	.tp_name = "sigrok.Decoder",
	136	.tp_basicsize = sizeof(sigrok_Decoder_object),
	137	.tp_flags = Py_TPFLAGS_DEFAULT \| Py_TPFLAGS_BASETYPE,
	138	.tp_doc = "Sigrok Decoder object",
	139	.tp_methods = Decoder_methods,
b2c19614 BV	140	};
	141
	142	PyMODINIT_FUNC init_sigrok_Decoder(void)
	143	{
	144	PyObject *mod;
	145
e5080882	146	/* assign this here, for compiler portability */
b2c19614 BV	147	sigrok_Decoder_type.tp_new = PyType_GenericNew;
	148	if (PyType_Ready(&sigrok_Decoder_type) < 0)
	149	return;
	150
	151	mod = Py_InitModule3("sigrok", no_methods, "sigrok base classes");
	152	Py_INCREF(&sigrok_Decoder_type);
	153	PyModule_AddObject(mod, "Decoder", (PyObject *)&sigrok_Decoder_type);
	154
	155	}
	156
	157
e5080882 BV	158	struct srd_decoder_instance get_di_by_decobject(void decobject)
	159	{
	160	GSList *l;
	161	struct srd_decoder_instance *di;
	162
	163	for (l = di_list; l; l = l->next) {
	164	di = l->data;
	165	if (decobject == di->py_instance)
	166	return di;
	167	}
	168
	169	return NULL;
	170	}
	171
b2c19614 BV	172	/**
	173	* Initialize libsigrokdecode.
	174	*
	175	* This initializes the Python interpreter, and creates and initializes
	176	* a "sigrok" Python module with a single put() method.
	177	*
	178	* Then, it searches for sigrok protocol decoder files (*.py) in the
	179	* "decoders" subdirectory of the the sigrok installation directory.
	180	* All decoders that are found are loaded into memory and added to an
	181	* internal list of decoders, which can be queried via srd_list_decoders().
	182	*
	183	* The caller is responsible for calling the clean-up function srd_exit(),
	184	* which will properly shut down libsigrokdecode and free its allocated memory.
	185	*
	186	* Multiple calls to srd_init(), without calling srd_exit() inbetween,
	187	* are not allowed.
	188	*
	189	* @return SRD_OK upon success, a (negative) error code otherwise.
	190	* Upon Python errors, return SRD_ERR_PYTHON. If the sigrok decoders
	191	* directory cannot be accessed, return SRD_ERR_DECODERS_DIR.
	192	* If not enough memory could be allocated, return SRD_ERR_MALLOC.
	193	*/
	194	int srd_init(void)
	195	{
	196	int ret;
	197
	198	/* Py_Initialize() returns void and usually cannot fail. */
	199	Py_Initialize();
	200
	201	init_sigrok_Decoder();
	202
	203	PyRun_SimpleString("import sys;");
	204	if ((ret = set_modulepath()) != SRD_OK) {
	205	Py_Finalize();
	206	return ret;
	207	}
	208
	209	if ((ret = srd_load_all_decoders()) != SRD_OK) {
	210	Py_Finalize();
	211	return ret;
	212	}
	213
	214	return SRD_OK;
	215	}
	216
	217
	218	/**
	219	* Shutdown libsigrokdecode.
	220	*
	221	* This frees all the memory allocated for protocol decoders and shuts down
	222	* the Python interpreter.
	223	*
	224	* This function should only be called if there was a (successful!) invocation
	225	* of srd_init() before. Calling this function multiple times in a row, without
	226	* any successful srd_init() calls inbetween, is not allowed.
	227	*
	228	* @return SRD_OK upon success, a (negative) error code otherwise.
	229	*/
	230	int srd_exit(void)
	231	{
	232	/* Unload/free all decoders, and then the list of decoders itself. */
	233	/* TODO: Error handling. */
	234	srd_unload_all_decoders();
e5080882	235	g_slist_free(pd_list);
b2c19614 BV	236
	237	/* Py_Finalize() returns void, any finalization errors are ignored. */
	238	Py_Finalize();
	239
	240	return SRD_OK;
	241	}
	242
	243
	244	/**
	245	* Add search directories for the protocol decoders.
	246	*
	247	* TODO: add path from env var SIGROKDECODE_PATH, config etc
	248	*/
	249	int set_modulepath(void)
	250	{
	251	int ret;
	252
	253	ret = PyRun_SimpleString("sys.path.append(r'" DECODERS_DIR "');");
	254
	255	return ret;
	256	}
	257
	258
	259	struct srd_decoder_instance srd_instance_new(const char id)
	260	{
	261	struct srd_decoder *dec;
	262	struct srd_decoder_instance *di;
	263	PyObject *py_args;
	264
	265	fprintf(stdout, "%s: %s\n", __func__, id);
	266
	267	if (!(dec = srd_get_decoder_by_id(id)))
	268	return NULL;
	269
	270	/* TODO: Error handling. Use g_try_malloc(). */
	271	di = g_malloc(sizeof(*di));
	272	di->decoder = dec;
	273	di->pd_output = NULL;
	274
	275	/* Create an empty Python tuple. */
	276	if (!(py_args = PyTuple_New(0))) { /* NEWREF */
	277	if (PyErr_Occurred())
	278	PyErr_Print(); /* Returns void. */
	279
	280	return NULL; /* TODO: More specific error? */
	281	}
	282
	283	/* Create an instance of the 'Decoder' class. */
	284	di->py_instance = PyObject_Call(dec->py_decobj, py_args, NULL);
	285	if (!di->py_instance) {
	286	if (PyErr_Occurred())
	287	PyErr_Print(); /* Returns void. */
	288	Py_XDECREF(py_args);
	289	return NULL; /* TODO: More specific error? */
	290	}
e5080882	291	di_list = g_slist_append(di_list, di);
b2c19614 BV	292
	293	Py_XDECREF(py_args);
	294
	295	return di;
	296	}
	297
	298
	299	int srd_instance_set_probe(struct srd_decoder_instance *di,
	300	const char *probename, int num)
	301	{
	302	PyObject probedict, probenum;
	303
	304	probedict = PyObject_GetAttrString(di->py_instance, "probes"); /* NEWREF */
	305	if (!probedict) {
	306	if (PyErr_Occurred())
	307	PyErr_Print(); /* Returns void. */
	308
	309	return SRD_ERR_PYTHON; /* TODO: More specific error? */
	310	}
	311
	312	probenum = PyInt_FromLong(num);
	313	PyMapping_SetItemString(probedict, (char *)probename, probenum);
	314
	315	Py_XDECREF(probenum);
	316	Py_XDECREF(probedict);
	317
	318	return SRD_OK;
	319	}
	320
	321
	322	int srd_session_start(const char *driver, int unitsize, uint64_t starttime,
	323	uint64_t samplerate)
	324	{
	325	PyObject *py_res;
	326	GSList *d;
	327	struct srd_decoder_instance *di;
	328
	329	fprintf(stdout, "%s: %s\n", __func__, driver);
	330
e5080882	331	for (d = di_list; d; d = d->next) {
b2c19614 BV	332	di = d->data;
b2c19614 BV	333	if (!(py_res = PyObject_CallMethod(di->py_instance, "start",
6547acfd GM	334	"{s:s,s:l,s:l,s:l}",
	335	"driver", driver,
	336	"unitsize", (long)unitsize,
	337	"starttime", (long)starttime,
	338	"samplerate", (long)samplerate))) {
b2c19614 BV	339	if (PyErr_Occurred())
	340	PyErr_Print(); /* Returns void. */
	341
	342	return SRD_ERR_PYTHON; /* TODO: More specific error? */
	343	}
	344	Py_XDECREF(py_res);
	345	}
	346
	347	return SRD_OK;
	348	}
	349
	350
	351	/**
	352	* Run the specified decoder function.
	353	*
	354	* @param dec TODO
	355	* @param inbuf TODO
	356	* @param inbuflen TODO
b2c19614 BV	357	*
	358	* @return SRD_OK upon success, a (negative) error code otherwise.
	359	*/
	360	int srd_run_decoder(struct srd_decoder_instance *dec,
	361	uint8_t *inbuf, uint64_t inbuflen)
	362	{
	363	PyObject py_instance, py_res;
	364	/* FIXME: Don't have a timebase available here. Make one up. */
	365	static int _timehack = 0;
	366
	367	_timehack += inbuflen;
	368
	369	// fprintf(stdout, "%s: %s\n", __func__, dec->decoder->name);
	370
	371	/* Return an error upon unusable input. */
	372	if (dec == NULL)
a62186e4	373	return SRD_ERR_ARG; /* TODO: More specific error? */
b2c19614	374	if (inbuf == NULL)
a62186e4	375	return SRD_ERR_ARG; /* TODO: More specific error? */
b2c19614	376	if (inbuflen == 0) /* No point in working on empty buffers. */
a62186e4	377	return SRD_ERR_ARG; /* TODO: More specific error? */
b2c19614 BV	378
	379	/* TODO: Error handling. */
	380	py_instance = dec->py_instance;
	381	Py_XINCREF(py_instance);
	382
	383	if (!(py_res = PyObject_CallMethod(py_instance, "decode",
	384	"{s:i,s:i,s:s#}",
	385	"time", _timehack,
	386	"duration", 10,
	387	"data", inbuf, inbuflen))) { /* NEWREF */
	388	if (PyErr_Occurred())
	389	PyErr_Print(); /* Returns void. */
	390
	391	return SRD_ERR_PYTHON; /* TODO: More specific error? */
	392	}
	393
	394	Py_XDECREF(py_res);
	395	return SRD_OK;
	396	}
	397
	398
	399	/* Feed logic samples to decoder session. */
	400	int srd_session_feed(uint8_t *inbuf, uint64_t inbuflen)
	401	{
	402	GSList *d;
	403	int ret;
	404
	405	// fprintf(stdout, "%s: %d bytes\n", __func__, inbuflen);
	406
e5080882	407	for (d = di_list; d; d = d->next) {
b2c19614 BV	408	if ((ret = srd_run_decoder(d->data, inbuf, inbuflen)) != SRD_OK)
	409	return ret;
	410	}
	411
	412	return SRD_OK;
	413	}
	414
	415
e5080882 BV	416	int pd_output_new(struct srd_decoder_instance *di, int output_type,
	417	char protocol_id, char description)
	418	{
	419	GSList *l;
	420	struct srd_pd_output *pdo;
	421	int pdo_id;
	422
	423	fprintf(stdout, "%s: output type %d, protocol_id %s, description %s\n",
	424	__func__, output_type, protocol_id, description);
	425
	426	pdo_id = -1;
	427	for (l = di->pd_output; l; l = l->next) {
	428	pdo = l->data;
	429	if (pdo->pdo_id > pdo_id)
	430	pdo_id = pdo->pdo_id;
	431	}
	432	pdo_id++;
	433
	434	if (!(pdo = g_try_malloc(sizeof(struct srd_pd_output))))
	435	return -1;
	436
	437	pdo->pdo_id = pdo_id;
	438	pdo->output_type = output_type;
	439	pdo->protocol_id = g_strdup(protocol_id);
	440	pdo->description = g_strdup(description);
	441	di->pd_output = g_slist_append(di->pd_output, pdo);
	442
	443	return pdo_id;
	444	}
	445
	446
b2c19614 BV	447	//int srd_pipeline_new(int plid)
	448	//{
	449	//
	450	//
	451	//}
b2c19614 BV	452
	453
	454
	455