[libsigrokdecode.git] / controller.c

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


static GSList *callbacks = NULL;

/* TODO
static GSList *pipelines = NULL;
struct srd_pipeline {
	int id;
	GSList *decoders;
};
*/

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

/* lives in module_sigrokdecode.c */
extern PyMODINIT_FUNC PyInit_sigrokdecode(void);

/* lives in type_logic.c */
extern PyTypeObject srd_logic_type;


/**
 * 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;

	PyImport_AppendInittab("sigrokdecode", PyInit_sigrokdecode);

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

	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;

	PyRun_SimpleString("import sys");
	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;

	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;
	di->unitsize = 0;

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

	Py_XDECREF(probenum);
	Py_XDECREF(probedict);

	return SRD_OK;
}


int srd_session_start(int num_probes, int unitsize, uint64_t samplerate)
{
	PyObject *py_res;
	GSList *d;
	struct srd_decoder_instance *di;

	for (d = di_list; d; d = d->next) {
		di = d->data;
		di->num_probes = num_probes;
		di->unitsize = unitsize;
		di->samplerate = samplerate;
		if (!(py_res = PyObject_CallMethod(di->py_instance, "start",
				    "{s:l}",
					"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(uint64_t timeoffset, uint64_t duration,
		struct srd_decoder_instance *di, uint8_t *inbuf, uint64_t inbuflen)
{
	PyObject *py_instance, *py_res;
	srd_logic *logic;

	/* Return an error upon unusable input. */
	if (di == 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 = di->py_instance;
	Py_XINCREF(py_instance);

	logic = PyObject_New(srd_logic, &srd_logic_type);
	Py_INCREF(logic);
	logic->di = di;
	logic->itercnt = 0;
	logic->inbuf = inbuf;
	logic->inbuflen = inbuflen;
	logic->sample = PyList_New(2);
	Py_INCREF(logic->sample);

	if (!(py_res = PyObject_CallMethod(py_instance, "decode",
			"KKO", timeoffset, duration, logic))) {
		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(uint64_t timeoffset, uint64_t duration, uint8_t *inbuf,
		uint64_t inbuflen)
{
	GSList *d;
	int ret;

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

	return SRD_OK;
}


int pd_add(struct srd_decoder_instance *di, int output_type,
		char *protocol_id)
{
	struct srd_pd_output *pdo;

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

	/* pdo_id is just a simple index, nothing is deleted from this list anyway. */
	pdo->pdo_id = g_slist_length(di->pd_output);
	pdo->output_type = output_type;
	pdo->decoder = di->decoder;
	pdo->protocol_id = g_strdup(protocol_id);
	di->pd_output = g_slist_append(di->pd_output, pdo);

	return pdo->pdo_id;
}

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;
}

int srd_register_callback(int output_type, void *cb)
{
	struct srd_pd_callback *pd_cb;

	if (!(pd_cb = g_try_malloc(sizeof(struct srd_pd_callback))))
		return SRD_ERR_MALLOC;

	pd_cb->output_type = output_type;
	pd_cb->callback = cb;
	callbacks = g_slist_append(callbacks, pd_cb);

	return SRD_OK;
}

void *srd_find_callback(int output_type)
{
	GSList *l;
	struct srd_pd_callback *pd_cb;
	void *(cb);

	cb = NULL;
	for (l = callbacks; l; l = l->next) {
		pd_cb = l->data;
		if (pd_cb->output_type == output_type) {
			cb = pd_cb->callback;
			break;
		}
	}

	return cb;
}

//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>
bc5f5a43	5	* Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
b2c19614 BV	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"
73191416	22	#include "sigrokdecode.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */
b2c19614	23	#include <glib.h>
1aef2f93	24	#include <inttypes.h>
b2c19614	25
b2c19614	26
983cb0f5 BV	27	static GSList *callbacks = NULL;
983cb0f5 BV	28
e5080882	29	/* TODO
b2c19614	30	static GSList *pipelines = NULL;
b2c19614 BV	31	struct srd_pipeline {
	32	int id;
	33	GSList *decoders;
	34	};
bc5f5a43	35	*/
b2c19614	36
bc5f5a43 BV	37	/* lives in decoder.c */
	38	extern GSList *pd_list;
	39	extern GSList *di_list;
b2c19614	40
bc5f5a43 BV	41	/* lives in module_sigrokdecode.c */
bc5f5a43 BV	42	extern PyMODINIT_FUNC PyInit_sigrokdecode(void);
b2c19614	43
bc5f5a43 BV	44	/* lives in type_logic.c */
bc5f5a43 BV	45	extern PyTypeObject srd_logic_type;
b2c19614	46
e5080882	47
b2c19614 BV	48	/**
	49	* Initialize libsigrokdecode.
	50	*
	51	* This initializes the Python interpreter, and creates and initializes
	52	* a "sigrok" Python module with a single put() method.
	53	*
	54	* Then, it searches for sigrok protocol decoder files (*.py) in the
	55	* "decoders" subdirectory of the the sigrok installation directory.
	56	* All decoders that are found are loaded into memory and added to an
	57	* internal list of decoders, which can be queried via srd_list_decoders().
	58	*
	59	* The caller is responsible for calling the clean-up function srd_exit(),
	60	* which will properly shut down libsigrokdecode and free its allocated memory.
	61	*
	62	* Multiple calls to srd_init(), without calling srd_exit() inbetween,
	63	* are not allowed.
	64	*
	65	* @return SRD_OK upon success, a (negative) error code otherwise.
	66	* Upon Python errors, return SRD_ERR_PYTHON. If the sigrok decoders
	67	* directory cannot be accessed, return SRD_ERR_DECODERS_DIR.
	68	* If not enough memory could be allocated, return SRD_ERR_MALLOC.
	69	*/
	70	int srd_init(void)
	71	{
	72	int ret;
	73
bc5f5a43	74	PyImport_AppendInittab("sigrokdecode", PyInit_sigrokdecode);
5f802ec6	75
b2c19614 BV	76	/* Py_Initialize() returns void and usually cannot fail. */
	77	Py_Initialize();
	78
b2c19614 BV	79	if ((ret = set_modulepath()) != SRD_OK) {
	80	Py_Finalize();
	81	return ret;
	82	}
	83
	84	if ((ret = srd_load_all_decoders()) != SRD_OK) {
	85	Py_Finalize();
	86	return ret;
	87	}
	88
	89	return SRD_OK;
	90	}
	91
	92
	93	/**
	94	* Shutdown libsigrokdecode.
	95	*
	96	* This frees all the memory allocated for protocol decoders and shuts down
	97	* the Python interpreter.
	98	*
	99	* This function should only be called if there was a (successful!) invocation
	100	* of srd_init() before. Calling this function multiple times in a row, without
	101	* any successful srd_init() calls inbetween, is not allowed.
	102	*
	103	* @return SRD_OK upon success, a (negative) error code otherwise.
	104	*/
	105	int srd_exit(void)
	106	{
	107	/* Unload/free all decoders, and then the list of decoders itself. */
	108	/* TODO: Error handling. */
	109	srd_unload_all_decoders();
e5080882	110	g_slist_free(pd_list);
b2c19614 BV	111
	112	/* Py_Finalize() returns void, any finalization errors are ignored. */
	113	Py_Finalize();
	114
	115	return SRD_OK;
	116	}
	117
	118
	119	/**
	120	* Add search directories for the protocol decoders.
	121	*
	122	* TODO: add path from env var SIGROKDECODE_PATH, config etc
	123	*/
	124	int set_modulepath(void)
	125	{
	126	int ret;
	127
bc5f5a43	128	PyRun_SimpleString("import sys");
b2c19614 BV	129	ret = PyRun_SimpleString("sys.path.append(r'" DECODERS_DIR "');");
	130
	131	return ret;
	132	}
	133
	134
	135	struct srd_decoder_instance srd_instance_new(const char id)
	136	{
	137	struct srd_decoder *dec;
	138	struct srd_decoder_instance *di;
	139	PyObject *py_args;
	140
b2c19614 BV	141	if (!(dec = srd_get_decoder_by_id(id)))
	142	return NULL;
	143
	144	/* TODO: Error handling. Use g_try_malloc(). */
	145	di = g_malloc(sizeof(*di));
	146	di->decoder = dec;
	147	di->pd_output = NULL;
bc5f5a43	148	di->unitsize = 0;
b2c19614 BV	149
	150	/* Create an empty Python tuple. */
	151	if (!(py_args = PyTuple_New(0))) { /* NEWREF */
	152	if (PyErr_Occurred())
	153	PyErr_Print(); /* Returns void. */
	154
	155	return NULL; /* TODO: More specific error? */
	156	}
	157
	158	/* Create an instance of the 'Decoder' class. */
	159	di->py_instance = PyObject_Call(dec->py_decobj, py_args, NULL);
	160	if (!di->py_instance) {
	161	if (PyErr_Occurred())
	162	PyErr_Print(); /* Returns void. */
	163	Py_XDECREF(py_args);
	164	return NULL; /* TODO: More specific error? */
	165	}
e5080882	166	di_list = g_slist_append(di_list, di);
b2c19614 BV	167
	168	Py_XDECREF(py_args);
	169
	170	return di;
	171	}
	172
	173
	174	int srd_instance_set_probe(struct srd_decoder_instance *di,
	175	const char *probename, int num)
	176	{
	177	PyObject probedict, probenum;
	178
	179	probedict = PyObject_GetAttrString(di->py_instance, "probes"); /* NEWREF */
	180	if (!probedict) {
	181	if (PyErr_Occurred())
	182	PyErr_Print(); /* Returns void. */
	183
	184	return SRD_ERR_PYTHON; /* TODO: More specific error? */
	185	}
	186
5f802ec6	187	probenum = PyLong_FromLong(num);
b2c19614 BV	188	PyMapping_SetItemString(probedict, (char *)probename, probenum);
	189
	190	Py_XDECREF(probenum);
	191	Py_XDECREF(probedict);
	192
	193	return SRD_OK;
	194	}
	195
	196
bc5f5a43	197	int srd_session_start(int num_probes, int unitsize, uint64_t samplerate)
b2c19614 BV	198	{
	199	PyObject *py_res;
	200	GSList *d;
	201	struct srd_decoder_instance *di;
	202
e5080882	203	for (d = di_list; d; d = d->next) {
b2c19614	204	di = d->data;
bc5f5a43 BV	205	di->num_probes = num_probes;
	206	di->unitsize = unitsize;
	207	di->samplerate = samplerate;
b2c19614	208	if (!(py_res = PyObject_CallMethod(di->py_instance, "start",
bc5f5a43	209	"{s:l}",
6547acfd	210	"samplerate", (long)samplerate))) {
b2c19614 BV	211	if (PyErr_Occurred())
	212	PyErr_Print(); /* Returns void. */
	213
	214	return SRD_ERR_PYTHON; /* TODO: More specific error? */
	215	}
	216	Py_XDECREF(py_res);
	217	}
	218
	219	return SRD_OK;
	220	}
	221
	222
	223	/**
	224	* Run the specified decoder function.
	225	*
	226	* @param dec TODO
	227	* @param inbuf TODO
	228	* @param inbuflen TODO
b2c19614 BV	229	*
	230	* @return SRD_OK upon success, a (negative) error code otherwise.
	231	*/
1aef2f93	232	int srd_run_decoder(uint64_t timeoffset, uint64_t duration,
bc5f5a43	233	struct srd_decoder_instance di, uint8_t inbuf, uint64_t inbuflen)
b2c19614 BV	234	{
b2c19614 BV	235	PyObject py_instance, py_res;
bc5f5a43	236	srd_logic *logic;
b2c19614 BV	237
b2c19614 BV	238	/* Return an error upon unusable input. */
bc5f5a43	239	if (di == NULL)
a62186e4	240	return SRD_ERR_ARG; /* TODO: More specific error? */
b2c19614	241	if (inbuf == NULL)
a62186e4	242	return SRD_ERR_ARG; /* TODO: More specific error? */
b2c19614	243	if (inbuflen == 0) /* No point in working on empty buffers. */
a62186e4	244	return SRD_ERR_ARG; /* TODO: More specific error? */
b2c19614 BV	245
b2c19614 BV	246	/* TODO: Error handling. */
bc5f5a43	247	py_instance = di->py_instance;
b2c19614 BV	248	Py_XINCREF(py_instance);
b2c19614 BV	249
bc5f5a43 BV	250	logic = PyObject_New(srd_logic, &srd_logic_type);
	251	Py_INCREF(logic);
	252	logic->di = di;
	253	logic->itercnt = 0;
	254	logic->inbuf = inbuf;
	255	logic->inbuflen = inbuflen;
	256	logic->sample = PyList_New(2);
	257	Py_INCREF(logic->sample);
	258
b2c19614	259	if (!(py_res = PyObject_CallMethod(py_instance, "decode",
bc5f5a43	260	"KKO", timeoffset, duration, logic))) {
b2c19614 BV	261	if (PyErr_Occurred())
	262	PyErr_Print(); /* Returns void. */
	263
	264	return SRD_ERR_PYTHON; /* TODO: More specific error? */
	265	}
	266
	267	Py_XDECREF(py_res);
bc5f5a43	268
b2c19614 BV	269	return SRD_OK;
	270	}
	271
	272
	273	/* Feed logic samples to decoder session. */
1aef2f93 BV	274	int srd_session_feed(uint64_t timeoffset, uint64_t duration, uint8_t *inbuf,
1aef2f93 BV	275	uint64_t inbuflen)
b2c19614 BV	276	{
	277	GSList *d;
	278	int ret;
	279
e5080882	280	for (d = di_list; d; d = d->next) {
1aef2f93 BV	281	if ((ret = srd_run_decoder(timeoffset, duration, d->data, inbuf,
1aef2f93 BV	282	inbuflen)) != SRD_OK)
b2c19614 BV	283	return ret;
	284	}
	285
	286	return SRD_OK;
	287	}
	288
	289
f9a3947a	290	int pd_add(struct srd_decoder_instance *di, int output_type,
15969949	291	char *protocol_id)
e5080882	292	{
e5080882	293	struct srd_pd_output *pdo;
e5080882 BV	294
	295	if (!(pdo = g_try_malloc(sizeof(struct srd_pd_output))))
	296	return -1;
	297
b231546d	298	/* pdo_id is just a simple index, nothing is deleted from this list anyway. */
15969949	299	pdo->pdo_id = g_slist_length(di->pd_output);
e5080882	300	pdo->output_type = output_type;
15969949	301	pdo->decoder = di->decoder;
e5080882	302	pdo->protocol_id = g_strdup(protocol_id);
e5080882 BV	303	di->pd_output = g_slist_append(di->pd_output, pdo);
e5080882 BV	304
15969949	305	return pdo->pdo_id;
e5080882 BV	306	}
e5080882 BV	307
bc5f5a43 BV	308	struct srd_decoder_instance get_di_by_decobject(void decobject)
	309	{
	310	GSList *l;
	311	struct srd_decoder_instance *di;
	312
	313	for (l = di_list; l; l = l->next) {
	314	di = l->data;
	315	if (decobject == di->py_instance)
	316	return di;
	317	}
	318
	319	return NULL;
	320	}
	321
983cb0f5 BV	322	int srd_register_callback(int output_type, void *cb)
	323	{
	324	struct srd_pd_callback *pd_cb;
	325
	326	if (!(pd_cb = g_try_malloc(sizeof(struct srd_pd_callback))))
	327	return SRD_ERR_MALLOC;
	328
	329	pd_cb->output_type = output_type;
	330	pd_cb->callback = cb;
	331	callbacks = g_slist_append(callbacks, pd_cb);
	332
983cb0f5 BV	333	return SRD_OK;
	334	}
	335
	336	void *srd_find_callback(int output_type)
	337	{
	338	GSList *l;
	339	struct srd_pd_callback *pd_cb;
	340	void *(cb);
	341
	342	cb = NULL;
	343	for (l = callbacks; l; l = l->next) {
	344	pd_cb = l->data;
	345	if (pd_cb->output_type == output_type) {
	346	cb = pd_cb->callback;
	347	break;
	348	}
	349	}
	350
	351	return cb;
	352	}
e5080882	353
b2c19614 BV	354	//int srd_pipeline_new(int plid)
	355	//{
	356	//
	357	//
	358	//}
b2c19614 BV	359
	360
	361
	362