[libsigrok.git] / session_driver.c

/*
 * This file is part of the sigrok project.
 *
 * 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 <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/time.h>
#include <zip.h>
#include <sigrok.h>

/* size of payloads sent across the session bus */
#define CHUNKSIZE 4096

struct session_vdevice {
	char *capturefile;
	struct zip *archive;
	struct zip_file *capfile;
	uint64_t samplerate;
	int unitsize;
	int num_probes;
};

static char *sessionfile = NULL;
static GSList *device_instances = NULL;
static int capabilities[] = {
	SR_HWCAP_CAPTUREFILE,
	SR_HWCAP_CAPTURE_UNITSIZE,
	0,
};


static struct session_vdevice *get_vdevice_by_index(int device_index)
{
	struct sr_device_instance *sdi;
	struct session_vdevice *vdevice;

	if (!(sdi = sr_get_device_instance(device_instances, device_index)))
		return NULL;

	vdevice = sdi->priv;

	return vdevice;
}

static int feed_chunk(int fd, int revents, void *user_data)
{
	struct sr_device_instance *sdi;
	struct session_vdevice *vdevice;
	struct sr_datafeed_packet packet;
	GSList *l;
	void *buf;
	int ret, got_data;

	/* avoid compiler warning */
	fd = fd;
	revents = revents;

	g_debug("session_driver: feed chunk");

	got_data = FALSE;
	for (l = device_instances; l; l = l->next) {
		sdi = l->data;
		vdevice = sdi->priv;
		if (!vdevice)
			/* already done with this instance */
			continue;

		buf = g_malloc(CHUNKSIZE);
		ret = zip_fread(vdevice->capfile, buf, CHUNKSIZE);
		if (ret > 0) {
			got_data = TRUE;
			packet.type = SR_DF_LOGIC;
			packet.length = ret;
			packet.unitsize = vdevice->unitsize;
			packet.payload = buf;
			sr_session_bus(user_data, &packet);
		} else {
			/* done with this capture file */
			zip_fclose(vdevice->capfile);
			g_free(vdevice->capturefile);
			g_free(vdevice);
			sdi->priv = NULL;
		}
	}

	if (!got_data) {
		packet.type = SR_DF_END;
		packet.length = 0;
		sr_session_bus(user_data, &packet);
	}

	return TRUE;
}

/* driver callbacks */

static int hw_init(char *deviceinfo)
{

	sessionfile = g_strdup(deviceinfo);

	return 0;
}

static void hw_cleanup(void)
{
	GSList *l;

	for (l = device_instances; l; l = l->next)
		sr_device_instance_free(l->data);

	g_free(sessionfile);

}

static int hw_opendev(int device_index)
{
	struct sr_device_instance *sdi;

	sdi = sr_device_instance_new(device_index, SR_ST_INITIALIZING,
		NULL, NULL, NULL);
	if (!sdi)
		return SR_ERR;
	sdi->priv = g_malloc0(sizeof(struct session_vdevice));
	if (!sdi->priv)
		return SR_ERR;
	device_instances = g_slist_append(device_instances, sdi);

	return SR_OK;
}

static void *hw_get_device_info(int device_index, int device_info_id)
{
	struct session_vdevice *vdevice;
	void *info;

	if (device_info_id != SR_DI_CUR_SAMPLERATE)
		return NULL;

	if (!(vdevice = get_vdevice_by_index(device_index)))
		return NULL;

	info = &vdevice->samplerate;

	return info;
}

static int hw_get_status(int device_index)
{

	/* avoid compiler warning */
	device_index = device_index;

	if (devices)
		return SR_OK;
	else
		return SR_ERR;
}

static int *hw_get_capabilities(void)
{

	return capabilities;
}

static int hw_set_configuration(int device_index, int capability, void *value)
{
	struct session_vdevice *vdevice;
	uint64_t *tmp_u64;

	if (!(vdevice = get_vdevice_by_index(device_index)))
		return SR_ERR;

	switch (capability) {
	case SR_HWCAP_SAMPLERATE:
		tmp_u64 = value;
		vdevice->samplerate = *tmp_u64;
		break;
	case SR_HWCAP_CAPTUREFILE:
		vdevice->capturefile = g_strdup(value);
		break;
	case SR_HWCAP_CAPTURE_UNITSIZE:
		tmp_u64 = value;
		vdevice->unitsize = *tmp_u64;
		break;
	case SR_HWCAP_CAPTURE_NUM_PROBES:
		tmp_u64 = value;
		vdevice->num_probes = *tmp_u64;
		break;
	default:
		return SR_ERR;
	}

	return SR_OK;
}

static int hw_start_acquisition(int device_index, gpointer session_device_id)
{
	struct zip_stat zs;
	struct session_vdevice *vdevice;
	struct sr_datafeed_header *header;
	struct sr_datafeed_packet *packet;
	int err;

	/* avoid compiler warning */
	session_device_id = session_device_id;

	if (!(vdevice = get_vdevice_by_index(device_index)))
		return SR_ERR;

	g_message("session_driver: opening archive %s file %s",
			sessionfile, vdevice->capturefile);

	if (!(vdevice->archive = zip_open(sessionfile, 0, &err))) {
		g_warning("Failed to open session file '%s': zip error %d\n",
				sessionfile, err);
		return SR_ERR;
	}

	if (zip_stat(vdevice->archive, vdevice->capturefile, 0, &zs) == -1) {
		g_warning("Failed to check capture file '%s' in session file '%s'.",
				vdevice->capturefile, sessionfile);
		return SR_ERR;
	}

	if (!(vdevice->capfile = zip_fopen(vdevice->archive, vdevice->capturefile, 0))) {
		g_warning("Failed to open capture file '%s' in session file '%s'.",
				vdevice->capturefile, sessionfile);
		return SR_ERR;
	}

	/* freewheeling source */
	sr_session_source_add(-1, 0, 0, feed_chunk, session_device_id);

	/* Send header packet to the session bus. */
	packet = g_malloc(sizeof(struct sr_datafeed_packet));
	header = g_malloc(sizeof(struct sr_datafeed_header));
	if (!packet || !header)
		return SR_ERR;
	packet->type = SR_DF_HEADER;
	packet->length = sizeof(struct sr_datafeed_header);
	packet->payload = (unsigned char *)header;
	header->feed_version = 1;
	gettimeofday(&header->starttime, NULL);
	header->samplerate = 0;
	header->protocol_id = SR_PROTO_RAW;
	header->num_logic_probes = vdevice->num_probes;
	header->num_analog_probes = 0;
	sr_session_bus(session_device_id, packet);
	g_free(header);
	g_free(packet);

	return SR_OK;
}


struct sr_device_plugin session_driver = {
	"session",
	"Session-emulating driver",
	1,
	hw_init,
	hw_cleanup,
	hw_opendev,
	NULL,
	hw_get_device_info,
	hw_get_status,
	hw_get_capabilities,
	hw_set_configuration,
	hw_start_acquisition,
	NULL,
};
Commit	Line	Data
7d658874 BV	1	/*
	2	* This file is part of the sigrok project.
	3	*
	4	* Copyright (C) 2011 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 <sys/types.h>
	21	#include <sys/stat.h>
	22	#include <fcntl.h>
	23	#include <unistd.h>
	24	#include <sys/time.h>
	25	#include <zip.h>
	26	#include <sigrok.h>
	27
	28	/* size of payloads sent across the session bus */
	29	#define CHUNKSIZE 4096
	30
	31	struct session_vdevice {
	32	char *capturefile;
	33	struct zip *archive;
	34	struct zip_file *capfile;
	35	uint64_t samplerate;
	36	int unitsize;
	37	int num_probes;
	38	};
	39
	40	static char *sessionfile = NULL;
	41	static GSList *device_instances = NULL;
	42	static int capabilities[] = {
	43	SR_HWCAP_CAPTUREFILE,
	44	SR_HWCAP_CAPTURE_UNITSIZE,
	45	0,
	46	};
	47
	48
	49	static struct session_vdevice *get_vdevice_by_index(int device_index)
	50	{
	51	struct sr_device_instance *sdi;
	52	struct session_vdevice *vdevice;
	53
	54	if (!(sdi = sr_get_device_instance(device_instances, device_index)))
	55	return NULL;
	56
	57	vdevice = sdi->priv;
	58
	59	return vdevice;
	60	}
	61
	62	static int feed_chunk(int fd, int revents, void *user_data)
	63	{
	64	struct sr_device_instance *sdi;
65	struct session_vdevice *vdevice;
66	struct sr_datafeed_packet packet;
67	GSList *l;
68	void *buf;
69	int ret, got_data;
70
71	/* avoid compiler warning */
72	fd = fd;
73	revents = revents;
74
75	g_debug("session_driver: feed chunk");
76
77	got_data = FALSE;
78	for (l = device_instances; l; l = l->next) {
79	sdi = l->data;
80	vdevice = sdi->priv;
81	if (!vdevice)
82	/* already done with this instance */
83	continue;
84
85	buf = g_malloc(CHUNKSIZE);
86	ret = zip_fread(vdevice->capfile, buf, CHUNKSIZE);
87	if (ret > 0) {
88	got_data = TRUE;
89	packet.type = SR_DF_LOGIC;
90	packet.length = ret;
91	packet.unitsize = vdevice->unitsize;
92	packet.payload = buf;
8a2efef2	93	sr_session_bus(user_data, &packet);
7d658874 BV	94	} else {
	95	/* done with this capture file */
	96	zip_fclose(vdevice->capfile);
	97	g_free(vdevice->capturefile);
	98	g_free(vdevice);
	99	sdi->priv = NULL;
	100	}
	101	}
	102
	103	if (!got_data) {
	104	packet.type = SR_DF_END;
	105	packet.length = 0;
8a2efef2	106	sr_session_bus(user_data, &packet);
7d658874 BV	107	}
	108
	109	return TRUE;
	110	}
	111
	112	/* driver callbacks */
	113
	114	static int hw_init(char *deviceinfo)
	115	{
	116
	117	sessionfile = g_strdup(deviceinfo);
	118
	119	return 0;
	120	}
	121
	122	static void hw_cleanup(void)
	123	{
	124	GSList *l;
	125
	126	for (l = device_instances; l; l = l->next)
	127	sr_device_instance_free(l->data);
	128
	129	g_free(sessionfile);
	130
	131	}
	132
	133	static int hw_opendev(int device_index)
	134	{
	135	struct sr_device_instance *sdi;
	136
	137	sdi = sr_device_instance_new(device_index, SR_ST_INITIALIZING,
	138	NULL, NULL, NULL);
	139	if (!sdi)
	140	return SR_ERR;
	141	sdi->priv = g_malloc0(sizeof(struct session_vdevice));
	142	if (!sdi->priv)
	143	return SR_ERR;
	144	device_instances = g_slist_append(device_instances, sdi);
	145
	146	return SR_OK;
	147	}
	148
7d658874 BV	149	static void *hw_get_device_info(int device_index, int device_info_id)
	150	{
	151	struct session_vdevice *vdevice;
	152	void *info;
	153
b8c2f85f BV	154	if (device_info_id != SR_DI_CUR_SAMPLERATE)
	155	return NULL;
	156
7d658874 BV	157	if (!(vdevice = get_vdevice_by_index(device_index)))
	158	return NULL;
	159
	160	info = &vdevice->samplerate;
	161
	162	return info;
	163	}
	164
	165	static int hw_get_status(int device_index)
	166	{
	167
	168	/* avoid compiler warning */
	169	device_index = device_index;
	170
	171	if (devices)
	172	return SR_OK;
	173	else
	174	return SR_ERR;
	175	}
	176
	177	static int *hw_get_capabilities(void)
	178	{
	179
	180	return capabilities;
	181	}
	182
	183	static int hw_set_configuration(int device_index, int capability, void *value)
	184	{
	185	struct session_vdevice *vdevice;
	186	uint64_t *tmp_u64;
	187
	188	if (!(vdevice = get_vdevice_by_index(device_index)))
	189	return SR_ERR;
	190
	191	switch (capability) {
	192	case SR_HWCAP_SAMPLERATE:
	193	tmp_u64 = value;
	194	vdevice->samplerate = *tmp_u64;
	195	break;
	196	case SR_HWCAP_CAPTUREFILE:
	197	vdevice->capturefile = g_strdup(value);
	198	break;
	199	case SR_HWCAP_CAPTURE_UNITSIZE:
	200	tmp_u64 = value;
	201	vdevice->unitsize = *tmp_u64;
	202	break;
	203	case SR_HWCAP_CAPTURE_NUM_PROBES:
	204	tmp_u64 = value;
	205	vdevice->num_probes = *tmp_u64;
	206	break;
	207	default:
	208	return SR_ERR;
	209	}
	210
	211	return SR_OK;
	212	}
	213
	214	static int hw_start_acquisition(int device_index, gpointer session_device_id)
	215	{
	216	struct zip_stat zs;
	217	struct session_vdevice *vdevice;
	218	struct sr_datafeed_header *header;
	219	struct sr_datafeed_packet *packet;
	220	int err;
221
222	/* avoid compiler warning */
223	session_device_id = session_device_id;
224
225	if (!(vdevice = get_vdevice_by_index(device_index)))
226	return SR_ERR;
227
228	g_message("session_driver: opening archive %s file %s",
229	sessionfile, vdevice->capturefile);
230
231	if (!(vdevice->archive = zip_open(sessionfile, 0, &err))) {
232	g_warning("Failed to open session file '%s': zip error %d\n",
233	sessionfile, err);
234	return SR_ERR;
235	}
236
237	if (zip_stat(vdevice->archive, vdevice->capturefile, 0, &zs) == -1) {
238	g_warning("Failed to check capture file '%s' in session file '%s'.",
239	vdevice->capturefile, sessionfile);
240	return SR_ERR;
241	}
242
243	if (!(vdevice->capfile = zip_fopen(vdevice->archive, vdevice->capturefile, 0))) {
244	g_warning("Failed to open capture file '%s' in session file '%s'.",
245	vdevice->capturefile, sessionfile);
246	return SR_ERR;
247	}
248
249	/* freewheeling source */
8a2efef2	250	sr_session_source_add(-1, 0, 0, feed_chunk, session_device_id);
7d658874 BV	251
	252	/* Send header packet to the session bus. */
	253	packet = g_malloc(sizeof(struct sr_datafeed_packet));
	254	header = g_malloc(sizeof(struct sr_datafeed_header));
	255	if (!packet \|\| !header)
	256	return SR_ERR;
	257	packet->type = SR_DF_HEADER;
	258	packet->length = sizeof(struct sr_datafeed_header);
	259	packet->payload = (unsigned char *)header;
	260	header->feed_version = 1;
	261	gettimeofday(&header->starttime, NULL);
	262	header->samplerate = 0;
	263	header->protocol_id = SR_PROTO_RAW;
	264	header->num_logic_probes = vdevice->num_probes;
	265	header->num_analog_probes = 0;
8a2efef2	266	sr_session_bus(session_device_id, packet);
7d658874 BV	267	g_free(header);
	268	g_free(packet);
	269
	270	return SR_OK;
	271	}
	272
7d658874 BV	273
	274	struct sr_device_plugin session_driver = {
	275	"session",
	276	"Session-emulating driver",
	277	1,
	278	hw_init,
	279	hw_cleanup,
	280	hw_opendev,
b8c2f85f	281	NULL,
7d658874 BV	282	hw_get_device_info,
	283	hw_get_status,
	284	hw_get_capabilities,
	285	hw_set_configuration,
	286	hw_start_acquisition,
8a2efef2	287	NULL,
7d658874	288	};