[libsigrok.git] / src / session_driver.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2013 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 <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/time.h>
#include <zip.h>
#include <libsigrok/libsigrok.h>
#include "libsigrok-internal.h"

#define LOG_PREFIX "virtual-session"

/* size of payloads sent across the session bus */
/** @cond PRIVATE */
#define CHUNKSIZE (512 * 1024)
/** @endcond */

SR_PRIV struct sr_dev_driver session_driver_info;

struct session_vdev {
	char *sessionfile;
	char *capturefile;
	struct zip *archive;
	struct zip_file *capfile;
	int bytes_read;
	uint64_t samplerate;
	int unitsize;
	int num_channels;
	int cur_chunk;
	gboolean finished;
};

static const uint32_t devopts[] = {
	SR_CONF_CAPTUREFILE | SR_CONF_SET,
	SR_CONF_CAPTURE_UNITSIZE | SR_CONF_GET | SR_CONF_SET,
	SR_CONF_NUM_LOGIC_CHANNELS | SR_CONF_SET,
	SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET,
	SR_CONF_SESSIONFILE | SR_CONF_SET,
};

static gboolean stream_session_data(struct sr_dev_inst *sdi)
{
	struct session_vdev *vdev;
	struct sr_datafeed_packet packet;
	struct sr_datafeed_logic logic;
	struct zip_stat zs;
	int ret, got_data;
	char capturefile[16];
	void *buf;

	got_data = FALSE;
	vdev = sdi->priv;
	if (!vdev->capfile) {
		/* No capture file opened yet, or finished with the last
		 * chunked one. */
		if (vdev->cur_chunk == 0) {
			/* capturefile is always the unchunked base name. */
			if (zip_stat(vdev->archive, vdev->capturefile, 0, &zs) != -1) {
				/* No chunks, just a single capture file. */
				vdev->cur_chunk = 0;
				if (!(vdev->capfile = zip_fopen(vdev->archive,
						vdev->capturefile, 0)))
					return FALSE;
				sr_dbg("Opened %s.", vdev->capturefile);
			} else {
				/* Try as first chunk filename. */
				snprintf(capturefile, 15, "%s-1", vdev->capturefile);
				if (zip_stat(vdev->archive, capturefile, 0, &zs) != -1) {
					vdev->cur_chunk = 1;
					if (!(vdev->capfile = zip_fopen(vdev->archive,
							capturefile, 0)))
						return FALSE;
					sr_dbg("Opened %s.", capturefile);
				} else {
					sr_err("No capture file '%s' in " "session file '%s'.",
							vdev->capturefile, vdev->sessionfile);
					return FALSE;
				}
			}
		} else {
			/* Capture data is chunked, advance to the next chunk. */
			vdev->cur_chunk++;
			snprintf(capturefile, 15, "%s-%d", vdev->capturefile,
					vdev->cur_chunk);
			if (zip_stat(vdev->archive, capturefile, 0, &zs) != -1) {
				if (!(vdev->capfile = zip_fopen(vdev->archive,
						capturefile, 0)))
					return FALSE;
				sr_dbg("Opened %s.", capturefile);
			} else {
				/* We got all the chunks, finish up. */
				return FALSE;
			}
		}
	}

	buf = g_malloc(CHUNKSIZE);

	ret = zip_fread(vdev->capfile, buf,
			CHUNKSIZE / vdev->unitsize * vdev->unitsize);
	if (ret > 0) {
		if (ret % vdev->unitsize != 0)
			sr_warn("Read size %d not a multiple of the"
				" unit size %d.", ret, vdev->unitsize);
		got_data = TRUE;
		packet.type = SR_DF_LOGIC;
		packet.payload = &logic;
		logic.length = ret;
		logic.unitsize = vdev->unitsize;
		logic.data = buf;
		vdev->bytes_read += ret;
		sr_session_send(sdi, &packet);
	} else {
		/* done with this capture file */
		zip_fclose(vdev->capfile);
		vdev->capfile = NULL;
		if (vdev->cur_chunk != 0) {
			/* There might be more chunks, so don't fall through
			 * to the SR_DF_END here. */
			got_data = TRUE;
		}
	}
	g_free(buf);

	return got_data;
}

static int receive_data(int fd, int revents, void *cb_data)
{
	struct sr_dev_inst *sdi;
	struct session_vdev *vdev;
	struct sr_datafeed_packet packet;

	(void)fd;
	(void)revents;

	sdi = cb_data;
	vdev = sdi->priv;

	if (!vdev->finished && !stream_session_data(sdi))
		vdev->finished = TRUE;
	if (!vdev->finished)
		return G_SOURCE_CONTINUE;

	if (vdev->capfile) {
		zip_fclose(vdev->capfile);
		vdev->capfile = NULL;
	}
	if (vdev->archive) {
		zip_discard(vdev->archive);
		vdev->archive = NULL;
	}
	packet.type = SR_DF_END;
	packet.payload = NULL;
	sr_session_send(sdi, &packet);

	return G_SOURCE_REMOVE;
}

/* driver callbacks */

static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
{
	return std_init(sr_ctx, di, LOG_PREFIX);
}

static int dev_clear(const struct sr_dev_driver *di)
{
	struct drv_context *drvc;
	GSList *l;

	drvc = di->context;
	for (l = drvc->instances; l; l = l->next)
		sr_dev_inst_free(l->data);
	g_slist_free(drvc->instances);
	drvc->instances = NULL;

	return SR_OK;
}

static int dev_open(struct sr_dev_inst *sdi)
{
	struct sr_dev_driver *di;
	struct drv_context *drvc;
	struct session_vdev *vdev;

	di = sdi->driver;
	drvc = di->context;
	vdev = g_malloc0(sizeof(struct session_vdev));
	sdi->priv = vdev;
	drvc->instances = g_slist_append(drvc->instances, sdi);

	return SR_OK;
}

static int dev_close(struct sr_dev_inst *sdi)
{
	const struct session_vdev *const vdev = sdi->priv;
	g_free(vdev->sessionfile);
	g_free(vdev->capturefile);

	g_free(sdi->priv);
	sdi->priv = NULL;

	return SR_OK;
}

static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	struct session_vdev *vdev;

	(void)cg;

	if (!sdi)
		return SR_ERR;

	vdev = sdi->priv;

	switch (key) {
	case SR_CONF_SAMPLERATE:
		*data = g_variant_new_uint64(vdev->samplerate);
		break;
	case SR_CONF_CAPTURE_UNITSIZE:
		*data = g_variant_new_uint64(vdev->unitsize);
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	struct session_vdev *vdev;

	(void)cg;

	vdev = sdi->priv;

	switch (key) {
	case SR_CONF_SAMPLERATE:
		vdev->samplerate = g_variant_get_uint64(data);
		sr_info("Setting samplerate to %" PRIu64 ".", vdev->samplerate);
		break;
	case SR_CONF_SESSIONFILE:
		g_free(vdev->sessionfile);
		vdev->sessionfile = g_strdup(g_variant_get_string(data, NULL));
		sr_info("Setting sessionfile to '%s'.", vdev->sessionfile);
		break;
	case SR_CONF_CAPTUREFILE:
		g_free(vdev->capturefile);
		vdev->capturefile = g_strdup(g_variant_get_string(data, NULL));
		sr_info("Setting capturefile to '%s'.", vdev->capturefile);
		break;
	case SR_CONF_CAPTURE_UNITSIZE:
		vdev->unitsize = g_variant_get_uint64(data);
		break;
	case SR_CONF_NUM_LOGIC_CHANNELS:
		vdev->num_channels = g_variant_get_int32(data);
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	(void)sdi;
	(void)cg;

	switch (key) {
	case SR_CONF_DEVICE_OPTIONS:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
{
	struct session_vdev *vdev;
	int ret;

	(void)cb_data;

	vdev = sdi->priv;
	vdev->bytes_read = 0;
	vdev->cur_chunk = 0;
	vdev->finished = FALSE;

	sr_info("Opening archive %s file %s", vdev->sessionfile,
		vdev->capturefile);

	if (!(vdev->archive = zip_open(vdev->sessionfile, 0, &ret))) {
		sr_err("Failed to open session file '%s': "
		       "zip error %d.", vdev->sessionfile, ret);
		return SR_ERR;
	}

	/* Send header packet to the session bus. */
	std_session_send_df_header(sdi, LOG_PREFIX);

	/* freewheeling source */
	sr_session_source_add(sdi->session, -1, 0, 0, receive_data, (void *)sdi);

	return SR_OK;
}

static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
	struct session_vdev *vdev;

	(void)cb_data;
	vdev = sdi->priv;

	vdev->finished = TRUE;

	return SR_OK;
}

/** @private */
SR_PRIV struct sr_dev_driver session_driver = {
	.name = "virtual-session",
	.longname = "Session-emulating driver",
	.api_version = 1,
	.init = init,
	.cleanup = dev_clear,
	.scan = NULL,
	.dev_list = NULL,
	.dev_clear = dev_clear,
	.config_get = config_get,
	.config_set = config_set,
	.config_list = config_list,
	.dev_open = dev_open,
	.dev_close = dev_close,
	.dev_acquisition_start = dev_acquisition_start,
	.dev_acquisition_stop = dev_acquisition_stop,
	.context = NULL,
};
Commit	Line	Data
7d658874	1	/*
50985c20	2	* This file is part of the libsigrok project.
7d658874	3	*
13d8e03c	4	* Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
7d658874 BV	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
6ec6c43b	20	#include <config.h>
7d658874 BV	21	#include <sys/types.h>
	22	#include <sys/stat.h>
	23	#include <fcntl.h>
	24	#include <unistd.h>
	25	#include <sys/time.h>
	26	#include <zip.h>
c1aae900	27	#include <libsigrok/libsigrok.h>
45c59c8b	28	#include "libsigrok-internal.h"
7d658874	29
3544f848	30	#define LOG_PREFIX "virtual-session"
a885ce3e	31
7d658874	32	/* size of payloads sent across the session bus */
b4bd7088	33	/** @cond PRIVATE */
8ff6afc9	34	#define CHUNKSIZE (512 * 1024)
b4bd7088	35	/** @endcond */
7d658874	36
102f1239	37	SR_PRIV struct sr_dev_driver session_driver_info;
102f1239	38
bb7ef793	39	struct session_vdev {
40dda2c3	40	char *sessionfile;
7d658874 BV	41	char *capturefile;
	42	struct zip *archive;
	43	struct zip_file *capfile;
cb1e389c	44	int bytes_read;
7d658874 BV	45	uint64_t samplerate;
7d658874 BV	46	int unitsize;
fca75cbb	47	int num_channels;
f438e0c9	48	int cur_chunk;
aa48adf9	49	gboolean finished;
7d658874 BV	50	};
7d658874 BV	51
f254bc4b	52	static const uint32_t devopts[] = {
68ac991d BV	53	SR_CONF_CAPTUREFILE \| SR_CONF_SET,
68ac991d BV	54	SR_CONF_CAPTURE_UNITSIZE \| SR_CONF_GET \| SR_CONF_SET,
02e49ae5	55	SR_CONF_NUM_LOGIC_CHANNELS \| SR_CONF_SET,
68ac991d	56	SR_CONF_SAMPLERATE \| SR_CONF_GET \| SR_CONF_SET,
02e49ae5	57	SR_CONF_SESSIONFILE \| SR_CONF_SET,
7d658874 BV	58	};
7d658874 BV	59
8d4097ff	60	static gboolean stream_session_data(struct sr_dev_inst *sdi)
7d658874	61	{
bb7ef793	62	struct session_vdev *vdev;
7d658874	63	struct sr_datafeed_packet packet;
9c939c51	64	struct sr_datafeed_logic logic;
f438e0c9	65	struct zip_stat zs;
7d658874	66	int ret, got_data;
f438e0c9 BV	67	char capturefile[16];
f438e0c9 BV	68	void *buf;
7d658874	69
7d658874	70	got_data = FALSE;
102f1239	71	vdev = sdi->priv;
8d4097ff DE	72	if (!vdev->capfile) {
	73	/* No capture file opened yet, or finished with the last
	74	* chunked one. */
	75	if (vdev->cur_chunk == 0) {
	76	/* capturefile is always the unchunked base name. */
	77	if (zip_stat(vdev->archive, vdev->capturefile, 0, &zs) != -1) {
	78	/* No chunks, just a single capture file. */
	79	vdev->cur_chunk = 0;
	80	if (!(vdev->capfile = zip_fopen(vdev->archive,
	81	vdev->capturefile, 0)))
	82	return FALSE;
	83	sr_dbg("Opened %s.", vdev->capturefile);
f438e0c9	84	} else {
8d4097ff DE	85	/* Try as first chunk filename. */
8d4097ff DE	86	snprintf(capturefile, 15, "%s-1", vdev->capturefile);
f438e0c9	87	if (zip_stat(vdev->archive, capturefile, 0, &zs) != -1) {
8d4097ff	88	vdev->cur_chunk = 1;
f438e0c9 BV	89	if (!(vdev->capfile = zip_fopen(vdev->archive,
	90	capturefile, 0)))
	91	return FALSE;
	92	sr_dbg("Opened %s.", capturefile);
	93	} else {
8d4097ff DE	94	sr_err("No capture file '%s' in " "session file '%s'.",
	95	vdev->capturefile, vdev->sessionfile);
	96	return FALSE;
f438e0c9 BV	97	}
f438e0c9 BV	98	}
7d658874	99	} else {
8d4097ff DE	100	/* Capture data is chunked, advance to the next chunk. */
	101	vdev->cur_chunk++;
	102	snprintf(capturefile, 15, "%s-%d", vdev->capturefile,
	103	vdev->cur_chunk);
	104	if (zip_stat(vdev->archive, capturefile, 0, &zs) != -1) {
	105	if (!(vdev->capfile = zip_fopen(vdev->archive,
	106	capturefile, 0)))
	107	return FALSE;
	108	sr_dbg("Opened %s.", capturefile);
f438e0c9	109	} else {
8d4097ff DE	110	/* We got all the chunks, finish up. */
8d4097ff DE	111	return FALSE;
f438e0c9	112	}
7d658874 BV	113	}
	114	}
	115
8d4097ff DE	116	buf = g_malloc(CHUNKSIZE);
	117
	118	ret = zip_fread(vdev->capfile, buf,
	119	CHUNKSIZE / vdev->unitsize * vdev->unitsize);
	120	if (ret > 0) {
	121	if (ret % vdev->unitsize != 0)
	122	sr_warn("Read size %d not a multiple of the"
	123	" unit size %d.", ret, vdev->unitsize);
	124	got_data = TRUE;
	125	packet.type = SR_DF_LOGIC;
	126	packet.payload = &logic;
	127	logic.length = ret;
	128	logic.unitsize = vdev->unitsize;
	129	logic.data = buf;
	130	vdev->bytes_read += ret;
102f1239	131	sr_session_send(sdi, &packet);
8d4097ff DE	132	} else {
	133	/* done with this capture file */
	134	zip_fclose(vdev->capfile);
	135	vdev->capfile = NULL;
	136	if (vdev->cur_chunk != 0) {
	137	/* There might be more chunks, so don't fall through
	138	* to the SR_DF_END here. */
	139	got_data = TRUE;
	140	}
7d658874	141	}
8d4097ff	142	g_free(buf);
7d658874	143
8d4097ff DE	144	return got_data;
	145	}
	146
	147	static int receive_data(int fd, int revents, void *cb_data)
	148	{
	149	struct sr_dev_inst *sdi;
	150	struct session_vdev *vdev;
	151	struct sr_datafeed_packet packet;
	152
	153	(void)fd;
	154	(void)revents;
	155
	156	sdi = cb_data;
	157	vdev = sdi->priv;
	158
	159	if (!vdev->finished && !stream_session_data(sdi))
	160	vdev->finished = TRUE;
	161	if (!vdev->finished)
	162	return G_SOURCE_CONTINUE;
	163
	164	if (vdev->capfile) {
	165	zip_fclose(vdev->capfile);
	166	vdev->capfile = NULL;
	167	}
	168	if (vdev->archive) {
	169	zip_discard(vdev->archive);
	170	vdev->archive = NULL;
	171	}
	172	packet.type = SR_DF_END;
	173	packet.payload = NULL;
	174	sr_session_send(sdi, &packet);
	175
	176	return G_SOURCE_REMOVE;
7d658874 BV	177	}
	178
	179	/* driver callbacks */
	180
4f840ce9	181	static int init(struct sr_dev_driver di, struct sr_context sr_ctx)
7d658874	182	{
102f1239	183	return std_init(sr_ctx, di, LOG_PREFIX);
7d658874 BV	184	}
7d658874 BV	185
4f840ce9	186	static int dev_clear(const struct sr_dev_driver *di)
7d658874	187	{
102f1239	188	struct drv_context *drvc;
7d658874 BV	189	GSList *l;
7d658874 BV	190
41812aca	191	drvc = di->context;
102f1239	192	for (l = drvc->instances; l; l = l->next)
d3683c42	193	sr_dev_inst_free(l->data);
102f1239 BV	194	g_slist_free(drvc->instances);
102f1239 BV	195	drvc->instances = NULL;
805e9640	196
57ab7d9f	197	return SR_OK;
7d658874 BV	198	}
7d658874 BV	199
6078d2c9	200	static int dev_open(struct sr_dev_inst *sdi)
7d658874	201	{
4f840ce9	202	struct sr_dev_driver *di;
102f1239	203	struct drv_context *drvc;
aa48adf9	204	struct session_vdev *vdev;
b53738ba	205
4f840ce9	206	di = sdi->driver;
41812aca	207	drvc = di->context;
102f1239	208	vdev = g_malloc0(sizeof(struct session_vdev));
aa48adf9	209	sdi->priv = vdev;
102f1239	210	drvc->instances = g_slist_append(drvc->instances, sdi);
7d658874 BV	211
	212	return SR_OK;
	213	}
	214
aa48adf9 BV	215	static int dev_close(struct sr_dev_inst *sdi)
aa48adf9 BV	216	{
8c9d4d67 JH	217	const struct session_vdev *const vdev = sdi->priv;
	218	g_free(vdev->sessionfile);
	219	g_free(vdev->capturefile);
	220
aa48adf9 BV	221	g_free(sdi->priv);
	222	sdi->priv = NULL;
	223
	224	return SR_OK;
	225	}
	226
584560f1	227	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
53b4680f	228	const struct sr_channel_group *cg)
7d658874	229	{
bb7ef793	230	struct session_vdev *vdev;
7d658874	231
53b4680f	232	(void)cg;
8f996b89	233
3f2cd87f UH	234	if (!sdi)
	235	return SR_ERR;
	236
	237	vdev = sdi->priv;
	238
584560f1	239	switch (key) {
123e1313	240	case SR_CONF_SAMPLERATE:
3f2cd87f UH	241	*data = g_variant_new_uint64(vdev->samplerate);
	242	break;
	243	case SR_CONF_CAPTURE_UNITSIZE:
	244	*data = g_variant_new_uint64(vdev->unitsize);
387014de BV	245	break;
387014de BV	246	default:
96ea73db	247	return SR_ERR_NA;
387014de	248	}
7d658874	249
387014de	250	return SR_OK;
7d658874 BV	251	}
7d658874 BV	252
584560f1	253	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
53b4680f	254	const struct sr_channel_group *cg)
7d658874	255	{
bb7ef793	256	struct session_vdev *vdev;
7d658874	257
53b4680f	258	(void)cg;
8f996b89	259
6f4b1868	260	vdev = sdi->priv;
7d658874	261
584560f1	262	switch (key) {
1953564a	263	case SR_CONF_SAMPLERATE:
003595ac	264	vdev->samplerate = g_variant_get_uint64(data);
a885ce3e	265	sr_info("Setting samplerate to %" PRIu64 ".", vdev->samplerate);
7d658874	266	break;
1953564a	267	case SR_CONF_SESSIONFILE:
8c9d4d67	268	g_free(vdev->sessionfile);
003595ac	269	vdev->sessionfile = g_strdup(g_variant_get_string(data, NULL));
a885ce3e	270	sr_info("Setting sessionfile to '%s'.", vdev->sessionfile);
40dda2c3	271	break;
1953564a	272	case SR_CONF_CAPTUREFILE:
8c9d4d67	273	g_free(vdev->capturefile);
003595ac	274	vdev->capturefile = g_strdup(g_variant_get_string(data, NULL));
a885ce3e	275	sr_info("Setting capturefile to '%s'.", vdev->capturefile);
7d658874	276	break;
1953564a	277	case SR_CONF_CAPTURE_UNITSIZE:
003595ac	278	vdev->unitsize = g_variant_get_uint64(data);
7d658874	279	break;
3f239f08	280	case SR_CONF_NUM_LOGIC_CHANNELS:
2c38a41a	281	vdev->num_channels = g_variant_get_int32(data);
7d658874 BV	282	break;
7d658874 BV	283	default:
96ea73db	284	return SR_ERR_NA;
7d658874 BV	285	}
	286
	287	return SR_OK;
	288	}
	289
584560f1	290	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
53b4680f	291	const struct sr_channel_group *cg)
9a6517d1	292	{
9a6517d1	293	(void)sdi;
53b4680f	294	(void)cg;
9a6517d1 BV	295
	296	switch (key) {
	297	case SR_CONF_DEVICE_OPTIONS:
584560f1	298	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
f254bc4b	299	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
9a6517d1 BV	300	break;
9a6517d1 BV	301	default:
96ea73db	302	return SR_ERR_NA;
9a6517d1 BV	303	}
	304
	305	return SR_OK;
	306	}
	307
6078d2c9	308	static int dev_acquisition_start(const struct sr_dev_inst sdi, void cb_data)
7d658874	309	{
bb7ef793	310	struct session_vdev *vdev;
ebc34738	311	int ret;
7d658874	312
102f1239	313	(void)cb_data;
7d658874	314
102f1239	315	vdev = sdi->priv;
8c9d4d67 JH	316	vdev->bytes_read = 0;
	317	vdev->cur_chunk = 0;
	318	vdev->finished = FALSE;
	319
a885ce3e	320	sr_info("Opening archive %s file %s", vdev->sessionfile,
bb7ef793	321	vdev->capturefile);
7d658874	322
40dda2c3	323	if (!(vdev->archive = zip_open(vdev->sessionfile, 0, &ret))) {
a885ce3e	324	sr_err("Failed to open session file '%s': "
9d122af8	325	"zip error %d.", vdev->sessionfile, ret);
7d658874 BV	326	return SR_ERR;
	327	}
	328
4afdfd46	329	/* Send header packet to the session bus. */
102f1239	330	std_session_send_df_header(sdi, LOG_PREFIX);
4afdfd46	331
7d658874	332	/* freewheeling source */
102f1239	333	sr_session_source_add(sdi->session, -1, 0, 0, receive_data, (void *)sdi);
7d658874	334
7d658874 BV	335	return SR_OK;
	336	}
	337
8d4097ff DE	338	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	339	{
	340	struct session_vdev *vdev;
	341
	342	(void)cb_data;
	343	vdev = sdi->priv;
	344
	345	vdev->finished = TRUE;
	346
	347	return SR_OK;
	348	}
	349
b4bd7088	350	/** @private */
c09f0b57	351	SR_PRIV struct sr_dev_driver session_driver = {
a885ce3e	352	.name = "virtual-session",
5097b0d0 UH	353	.longname = "Session-emulating driver",
5097b0d0 UH	354	.api_version = 1,
6078d2c9	355	.init = init,
824fba03	356	.cleanup = dev_clear,
96ea73db UH	357	.scan = NULL,
96ea73db UH	358	.dev_list = NULL,
824fba03	359	.dev_clear = dev_clear,
035a1078 BV	360	.config_get = config_get,
035a1078 BV	361	.config_set = config_set,
9a6517d1	362	.config_list = config_list,
6078d2c9	363	.dev_open = dev_open,
aa48adf9	364	.dev_close = dev_close,
6078d2c9	365	.dev_acquisition_start = dev_acquisition_start,
8d4097ff	366	.dev_acquisition_stop = dev_acquisition_stop,
41812aca	367	.context = NULL,
7d658874	368	};