[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 "sigrokdecode.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */
#include "sigrokdecode-internal.h"
#include "config.h"
#include <glib.h>
#include <inttypes.h>


static GSList *di_list = NULL;
static GSList *callbacks = NULL;

/* lives in decoder.c */
extern GSList *pd_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() in between,
 * 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 in between, 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;
}


/**
 * Create a new protocol decoder instance.
 *
 * TODO: this should be a decoder name, as decoder ids will disappear.
 *
 * @param id Decoder 'id' field.
 * @param instance_id Optional unique identifier for this instance. If NULL,
 *        the 'id' parameter is used.
 * @return Pointer to a newly allocated struct srd_decoder_instance, or
 *         NULL in case of failure.
 */
struct srd_decoder_instance *srd_instance_new(const char *id,
		const char *instance_id)
{
	struct srd_decoder *dec;
	struct srd_decoder_instance *di;
	PyObject *py_args;

	srd_dbg("%s: creating new %s instance", __func__, id);

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

	if (!(di = g_try_malloc(sizeof(*di)))) {
		srd_err("failed to malloc instance");
		return NULL;
	}
	di->decoder = dec;
	di->instance_id = g_strdup(instance_id ? instance_id : id);
	di->pd_output = NULL;
	di->num_probes = 0;
	di->unitsize = 0;
	di->samplerate = 0;
	di->next_di = NULL;

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

	/* Create an instance of the 'Decoder' class. */
	di->py_instance = PyObject_Call(dec->py_dec, py_args, NULL);
	if (!di->py_instance) {
		if (PyErr_Occurred())
			PyErr_Print();
		Py_XDECREF(py_args);
		return NULL;
	}

	/* Instance takes input from a frontend by default. */
	di_list = g_slist_append(di_list, di);

	Py_XDECREF(py_args);

	return di;
}

int srd_instance_stack(struct srd_decoder_instance *di_from,
		struct srd_decoder_instance *di_to)
{

	if (!di_from || !di_to) {
		srd_err("invalid from/to instance pair");
		return SRD_ERR_ARG;
	}

	if (!g_slist_find(di_list, di_from)) {
		srd_err("unstacked instance not found");
		return SRD_ERR_ARG;
	}

	/* Remove from the unstacked list. */
	di_list = g_slist_remove(di_list, di_to);

	/* Stack on top of source di. */
	di_from->next_di = g_slist_append(di_from->next_di, di_to);

	return SRD_OK;
}


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;
}

/* TODO: this should go into the PD stack */
struct srd_decoder_instance *srd_instance_find(char *instance_id)
{
	GSList *l;
	struct srd_decoder_instance *tmp, *di;

	di = NULL;
	for (l = di_list; l; l = l->next) {
		tmp = l->data;
		if (!strcmp(tmp->instance_id, instance_id)) {
			di = tmp;
			break;
		}
	}

	return di;
}

int srd_instance_start(struct srd_decoder_instance *di, PyObject *args)
{
	PyObject *py_name, *py_res;

	srd_dbg("calling start() method on protocol decoder instance %s", di->instance_id);

	if (!(py_name = PyUnicode_FromString("start"))) {
		srd_err("unable to build python object for 'start'");
		if (PyErr_Occurred())
			PyErr_Print();
		return SRD_ERR_PYTHON;
	}

	if (!(py_res = PyObject_CallMethodObjArgs(di->py_instance,
			py_name, args, NULL))) {
		if (PyErr_Occurred())
			PyErr_Print();
		return SRD_ERR_PYTHON;
	}

	Py_XDECREF(py_res);
	Py_DECREF(py_name);

	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_instance_decode(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;
}


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

	if (!(args = Py_BuildValue("{s:l}", "samplerate", (long)samplerate))) {
		srd_err("unable to build python object for metadata");
		return SRD_ERR_PYTHON;
	}

	/* Run the start() method on all decoders receiving frontend data. */
	for (d = di_list; d; d = d->next) {
		di = d->data;
		di->num_probes = num_probes;
		di->unitsize = unitsize;
		di->samplerate = samplerate;
		if ((ret = srd_instance_start(di, args) != SRD_OK))
			return ret;

		/* Run the start() method on all decoders up the stack from this one. */
		for (s = di->next_di; s; s = s->next) {
			/* These don't need probes, unitsize and samplerate. */
			di = s->data;
			if ((ret = srd_instance_start(di, args) != SRD_OK))
				return ret;
		}
	}

	Py_DECREF(args);

	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_instance_decode(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 *proto_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->proto_id = g_strdup(proto_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, *s;
	struct srd_decoder_instance *di;

	for (l = di_list; l; l = l->next) {
		di = l->data;
		if (decobject == di->py_instance)
			return di;
		/* Check decoders stacked on top of this one. */
		for (s = di->next_di; s; s = s->next) {
			di = s->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;
}
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
73191416	21	#include "sigrokdecode.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */
7ce7775c BV	22	#include "sigrokdecode-internal.h"
7ce7775c BV	23	#include "config.h"
b2c19614	24	#include <glib.h>
1aef2f93	25	#include <inttypes.h>
b2c19614	26
b2c19614	27
7ce7775c	28	static GSList *di_list = NULL;
983cb0f5 BV	29	static GSList *callbacks = NULL;
983cb0f5 BV	30
bc5f5a43 BV	31	/* lives in decoder.c */
bc5f5a43 BV	32	extern GSList *pd_list;
b2c19614	33
bc5f5a43 BV	34	/* lives in module_sigrokdecode.c */
bc5f5a43 BV	35	extern PyMODINIT_FUNC PyInit_sigrokdecode(void);
b2c19614	36
bc5f5a43 BV	37	/* lives in type_logic.c */
bc5f5a43 BV	38	extern PyTypeObject srd_logic_type;
b2c19614	39
e5080882	40
b2c19614 BV	41	/**
	42	* Initialize libsigrokdecode.
	43	*
	44	* This initializes the Python interpreter, and creates and initializes
	45	* a "sigrok" Python module with a single put() method.
	46	*
	47	* Then, it searches for sigrok protocol decoder files (*.py) in the
	48	* "decoders" subdirectory of the the sigrok installation directory.
	49	* All decoders that are found are loaded into memory and added to an
	50	* internal list of decoders, which can be queried via srd_list_decoders().
	51	*
	52	* The caller is responsible for calling the clean-up function srd_exit(),
	53	* which will properly shut down libsigrokdecode and free its allocated memory.
	54	*
7ce7775c	55	* Multiple calls to srd_init(), without calling srd_exit() in between,
b2c19614 BV	56	* are not allowed.
	57	*
	58	* @return SRD_OK upon success, a (negative) error code otherwise.
	59	* Upon Python errors, return SRD_ERR_PYTHON. If the sigrok decoders
	60	* directory cannot be accessed, return SRD_ERR_DECODERS_DIR.
	61	* If not enough memory could be allocated, return SRD_ERR_MALLOC.
	62	*/
	63	int srd_init(void)
	64	{
	65	int ret;
	66
bc5f5a43	67	PyImport_AppendInittab("sigrokdecode", PyInit_sigrokdecode);
5f802ec6	68
b2c19614 BV	69	/* Py_Initialize() returns void and usually cannot fail. */
	70	Py_Initialize();
	71
b2c19614 BV	72	if ((ret = set_modulepath()) != SRD_OK) {
	73	Py_Finalize();
	74	return ret;
	75	}
	76
	77	if ((ret = srd_load_all_decoders()) != SRD_OK) {
	78	Py_Finalize();
	79	return ret;
	80	}
	81
	82	return SRD_OK;
	83	}
	84
	85
	86	/**
	87	* Shutdown libsigrokdecode.
	88	*
	89	* This frees all the memory allocated for protocol decoders and shuts down
	90	* the Python interpreter.
	91	*
	92	* This function should only be called if there was a (successful!) invocation
	93	* of srd_init() before. Calling this function multiple times in a row, without
7ce7775c	94	* any successful srd_init() calls in between, is not allowed.
b2c19614 BV	95	*
	96	* @return SRD_OK upon success, a (negative) error code otherwise.
	97	*/
	98	int srd_exit(void)
	99	{
	100	/* Unload/free all decoders, and then the list of decoders itself. */
	101	/* TODO: Error handling. */
	102	srd_unload_all_decoders();
e5080882	103	g_slist_free(pd_list);
b2c19614 BV	104
	105	/* Py_Finalize() returns void, any finalization errors are ignored. */
	106	Py_Finalize();
	107
	108	return SRD_OK;
	109	}
	110
	111
	112	/**
	113	* Add search directories for the protocol decoders.
	114	*
	115	* TODO: add path from env var SIGROKDECODE_PATH, config etc
	116	*/
	117	int set_modulepath(void)
	118	{
	119	int ret;
	120
bc5f5a43	121	PyRun_SimpleString("import sys");
b2c19614 BV	122	ret = PyRun_SimpleString("sys.path.append(r'" DECODERS_DIR "');");
	123
	124	return ret;
	125	}
	126
	127
7ce7775c BV	128	/**
	129	* Create a new protocol decoder instance.
	130	*
	131	* TODO: this should be a decoder name, as decoder ids will disappear.
7ce7775c	132	*
42a85ed0 UH	133	* @param id Decoder 'id' field.
	134	* @param instance_id Optional unique identifier for this instance. If NULL,
	135	* the 'id' parameter is used.
	136	* @return Pointer to a newly allocated struct srd_decoder_instance, or
	137	* NULL in case of failure.
7ce7775c BV	138	*/
	139	struct srd_decoder_instance srd_instance_new(const char id,
	140	const char *instance_id)
b2c19614 BV	141	{
	142	struct srd_decoder *dec;
	143	struct srd_decoder_instance *di;
	144	PyObject *py_args;
	145
7ce7775c BV	146	srd_dbg("%s: creating new %s instance", __func__, id);
7ce7775c BV	147
b2c19614 BV	148	if (!(dec = srd_get_decoder_by_id(id)))
	149	return NULL;
	150
7ce7775c BV	151	if (!(di = g_try_malloc(sizeof(*di)))) {
	152	srd_err("failed to malloc instance");
	153	return NULL;
	154	}
b2c19614	155	di->decoder = dec;
7ce7775c	156	di->instance_id = g_strdup(instance_id ? instance_id : id);
b2c19614	157	di->pd_output = NULL;
7ce7775c	158	di->num_probes = 0;
bc5f5a43	159	di->unitsize = 0;
7ce7775c BV	160	di->samplerate = 0;
7ce7775c BV	161	di->next_di = NULL;
b2c19614 BV	162
	163	/* Create an empty Python tuple. */
	164	if (!(py_args = PyTuple_New(0))) { /* NEWREF */
	165	if (PyErr_Occurred())
7ce7775c BV	166	PyErr_Print();
7ce7775c BV	167	return NULL;
b2c19614 BV	168	}
	169
	170	/* Create an instance of the 'Decoder' class. */
451680f1	171	di->py_instance = PyObject_Call(dec->py_dec, py_args, NULL);
b2c19614 BV	172	if (!di->py_instance) {
b2c19614 BV	173	if (PyErr_Occurred())
7ce7775c	174	PyErr_Print();
b2c19614	175	Py_XDECREF(py_args);
7ce7775c	176	return NULL;
b2c19614	177	}
7ce7775c BV	178
7ce7775c BV	179	/* Instance takes input from a frontend by default. */
e5080882	180	di_list = g_slist_append(di_list, di);
b2c19614 BV	181
	182	Py_XDECREF(py_args);
	183
	184	return di;
	185	}
	186
7ce7775c BV	187	int srd_instance_stack(struct srd_decoder_instance *di_from,
	188	struct srd_decoder_instance *di_to)
	189	{
	190
	191	if (!di_from \|\| !di_to) {
	192	srd_err("invalid from/to instance pair");
	193	return SRD_ERR_ARG;
	194	}
	195
	196	if (!g_slist_find(di_list, di_from)) {
	197	srd_err("unstacked instance not found");
	198	return SRD_ERR_ARG;
	199	}
	200
	201	/* Remove from the unstacked list. */
	202	di_list = g_slist_remove(di_list, di_to);
	203
	204	/* Stack on top of source di. */
	205	di_from->next_di = g_slist_append(di_from->next_di, di_to);
	206
	207	return SRD_OK;
	208	}
	209
b2c19614 BV	210
	211	int srd_instance_set_probe(struct srd_decoder_instance *di,
	212	const char *probename, int num)
	213	{
	214	PyObject probedict, probenum;
	215
	216	probedict = PyObject_GetAttrString(di->py_instance, "probes"); /* NEWREF */
	217	if (!probedict) {
	218	if (PyErr_Occurred())
	219	PyErr_Print(); /* Returns void. */
	220
	221	return SRD_ERR_PYTHON; /* TODO: More specific error? */
	222	}
	223
5f802ec6	224	probenum = PyLong_FromLong(num);
b2c19614 BV	225	PyMapping_SetItemString(probedict, (char *)probename, probenum);
	226
	227	Py_XDECREF(probenum);
	228	Py_XDECREF(probedict);
	229
	230	return SRD_OK;
	231	}
	232
451680f1	233	/* TODO: this should go into the PD stack */
7ce7775c BV	234	struct srd_decoder_instance srd_instance_find(char instance_id)
	235	{
	236	GSList *l;
	237	struct srd_decoder_instance tmp, di;
b2c19614	238
7ce7775c BV	239	di = NULL;
	240	for (l = di_list; l; l = l->next) {
	241	tmp = l->data;
	242	if (!strcmp(tmp->instance_id, instance_id)) {
	243	di = tmp;
	244	break;
	245	}
	246	}
	247
	248	return di;
	249	}
	250
	251	int srd_instance_start(struct srd_decoder_instance di, PyObject args)
b2c19614	252	{
7ce7775c	253	PyObject py_name, py_res;
b2c19614	254
7ce7775c	255	srd_dbg("calling start() method on protocol decoder instance %s", di->instance_id);
b2c19614	256
7ce7775c BV	257	if (!(py_name = PyUnicode_FromString("start"))) {
	258	srd_err("unable to build python object for 'start'");
	259	if (PyErr_Occurred())
	260	PyErr_Print();
	261	return SRD_ERR_PYTHON;
	262	}
	263
	264	if (!(py_res = PyObject_CallMethodObjArgs(di->py_instance,
	265	py_name, args, NULL))) {
	266	if (PyErr_Occurred())
	267	PyErr_Print();
	268	return SRD_ERR_PYTHON;
b2c19614 BV	269	}
b2c19614 BV	270
7ce7775c BV	271	Py_XDECREF(py_res);
	272	Py_DECREF(py_name);
	273
b2c19614 BV	274	return SRD_OK;
	275	}
	276
b2c19614 BV	277	/**
	278	* Run the specified decoder function.
	279	*
	280	* @param dec TODO
	281	* @param inbuf TODO
	282	* @param inbuflen TODO
b2c19614 BV	283	*
	284	* @return SRD_OK upon success, a (negative) error code otherwise.
	285	*/
7ce7775c	286	int srd_instance_decode(uint64_t timeoffset, uint64_t duration,
bc5f5a43	287	struct srd_decoder_instance di, uint8_t inbuf, uint64_t inbuflen)
b2c19614 BV	288	{
b2c19614 BV	289	PyObject py_instance, py_res;
bc5f5a43	290	srd_logic *logic;
b2c19614 BV	291
b2c19614 BV	292	/* Return an error upon unusable input. */
bc5f5a43	293	if (di == NULL)
a62186e4	294	return SRD_ERR_ARG; /* TODO: More specific error? */
b2c19614	295	if (inbuf == NULL)
a62186e4	296	return SRD_ERR_ARG; /* TODO: More specific error? */
b2c19614	297	if (inbuflen == 0) /* No point in working on empty buffers. */
a62186e4	298	return SRD_ERR_ARG; /* TODO: More specific error? */
b2c19614 BV	299
b2c19614 BV	300	/* TODO: Error handling. */
bc5f5a43	301	py_instance = di->py_instance;
b2c19614 BV	302	Py_XINCREF(py_instance);
b2c19614 BV	303
bc5f5a43 BV	304	logic = PyObject_New(srd_logic, &srd_logic_type);
	305	Py_INCREF(logic);
	306	logic->di = di;
	307	logic->itercnt = 0;
	308	logic->inbuf = inbuf;
	309	logic->inbuflen = inbuflen;
	310	logic->sample = PyList_New(2);
	311	Py_INCREF(logic->sample);
	312
b2c19614	313	if (!(py_res = PyObject_CallMethod(py_instance, "decode",
bc5f5a43	314	"KKO", timeoffset, duration, logic))) {
b2c19614 BV	315	if (PyErr_Occurred())
	316	PyErr_Print(); /* Returns void. */
	317
	318	return SRD_ERR_PYTHON; /* TODO: More specific error? */
	319	}
	320
	321	Py_XDECREF(py_res);
bc5f5a43	322
b2c19614 BV	323	return SRD_OK;
	324	}
	325
	326
7ce7775c BV	327	int srd_session_start(int num_probes, int unitsize, uint64_t samplerate)
	328	{
	329	PyObject *args;
	330	GSList d, s;
	331	struct srd_decoder_instance *di;
	332	int ret;
	333
	334	if (!(args = Py_BuildValue("{s:l}", "samplerate", (long)samplerate))) {
	335	srd_err("unable to build python object for metadata");
	336	return SRD_ERR_PYTHON;
	337	}
	338
	339	/* Run the start() method on all decoders receiving frontend data. */
	340	for (d = di_list; d; d = d->next) {
	341	di = d->data;
	342	di->num_probes = num_probes;
	343	di->unitsize = unitsize;
	344	di->samplerate = samplerate;
	345	if ((ret = srd_instance_start(di, args) != SRD_OK))
	346	return ret;
	347
	348	/* Run the start() method on all decoders up the stack from this one. */
	349	for (s = di->next_di; s; s = s->next) {
	350	/* These don't need probes, unitsize and samplerate. */
	351	di = s->data;
	352	if ((ret = srd_instance_start(di, args) != SRD_OK))
	353	return ret;
	354	}
	355	}
	356
	357	Py_DECREF(args);
	358
	359	return SRD_OK;
	360	}
	361
b2c19614	362	/* Feed logic samples to decoder session. */
1aef2f93 BV	363	int srd_session_feed(uint64_t timeoffset, uint64_t duration, uint8_t *inbuf,
1aef2f93 BV	364	uint64_t inbuflen)
b2c19614 BV	365	{
	366	GSList *d;
	367	int ret;
	368
e5080882	369	for (d = di_list; d; d = d->next) {
7ce7775c	370	if ((ret = srd_instance_decode(timeoffset, duration, d->data, inbuf,
1aef2f93	371	inbuflen)) != SRD_OK)
b2c19614 BV	372	return ret;
	373	}
	374
	375	return SRD_OK;
	376	}
	377
	378
f9a3947a	379	int pd_add(struct srd_decoder_instance *di, int output_type,
94d43b37	380	char *proto_id)
e5080882	381	{
e5080882	382	struct srd_pd_output *pdo;
e5080882 BV	383
	384	if (!(pdo = g_try_malloc(sizeof(struct srd_pd_output))))
	385	return -1;
	386
b231546d	387	/* pdo_id is just a simple index, nothing is deleted from this list anyway. */
15969949	388	pdo->pdo_id = g_slist_length(di->pd_output);
e5080882	389	pdo->output_type = output_type;
15969949	390	pdo->decoder = di->decoder;
94d43b37	391	pdo->proto_id = g_strdup(proto_id);
e5080882 BV	392	di->pd_output = g_slist_append(di->pd_output, pdo);
e5080882 BV	393
15969949	394	return pdo->pdo_id;
e5080882 BV	395	}
e5080882 BV	396
bc5f5a43 BV	397	struct srd_decoder_instance get_di_by_decobject(void decobject)
bc5f5a43 BV	398	{
7ce7775c	399	GSList l, s;
bc5f5a43 BV	400	struct srd_decoder_instance *di;
	401
	402	for (l = di_list; l; l = l->next) {
	403	di = l->data;
	404	if (decobject == di->py_instance)
	405	return di;
7ce7775c BV	406	/* Check decoders stacked on top of this one. */
	407	for (s = di->next_di; s; s = s->next) {
	408	di = s->data;
	409	if (decobject == di->py_instance)
	410	return di;
	411	}
bc5f5a43 BV	412	}
	413
	414	return NULL;
	415	}
	416
983cb0f5 BV	417	int srd_register_callback(int output_type, void *cb)
	418	{
	419	struct srd_pd_callback *pd_cb;
	420
	421	if (!(pd_cb = g_try_malloc(sizeof(struct srd_pd_callback))))
	422	return SRD_ERR_MALLOC;
	423
	424	pd_cb->output_type = output_type;
	425	pd_cb->callback = cb;
	426	callbacks = g_slist_append(callbacks, pd_cb);
	427
983cb0f5 BV	428	return SRD_OK;
	429	}
	430
	431	void *srd_find_callback(int output_type)
	432	{
	433	GSList *l;
	434	struct srd_pd_callback *pd_cb;
	435	void *(cb);
	436
	437	cb = NULL;
	438	for (l = callbacks; l; l = l->next) {
	439	pd_cb = l->data;
	440	if (pd_cb->output_type == output_type) {
	441	cb = pd_cb->callback;
	442	break;
	443	}
	444	}
	445
	446	return cb;
	447	}
e5080882	448