[libsigrok.git] / session_driver.c

/*
 * This file is part of the sigrok project.
 *
 * Copyright (C) 2010-2012 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 <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/time.h>
#include <zip.h>
#include "libsigrok.h"
#include "libsigrok-internal.h"

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

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

static GSList *dev_insts = NULL;
static const int hwcaps[] = {
	SR_HWCAP_CAPTUREFILE,
	SR_HWCAP_CAPTURE_UNITSIZE,
	0,
};

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;
	struct sr_datafeed_logic logic;
	GSList *l;
	void *buf;
	int ret, got_data;

	/* Avoid compiler warnings. */
	(void)fd;
	(void)revents;

	sr_dbg("session_driver: feed chunk");

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

		if (!(buf = g_try_malloc(CHUNKSIZE))) {
			sr_err("session driver: %s: buf malloc failed", __func__);
			return FALSE;
		}

		ret = zip_fread(vdev->capfile, buf, CHUNKSIZE);
		if (ret > 0) {
			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(cb_data, &packet);
		} else {
			/* done with this capture file */
			zip_fclose(vdev->capfile);
			g_free(vdev->capturefile);
			g_free(vdev);
			sdi->priv = NULL;
		}
	}

	if (!got_data) {
		packet.type = SR_DF_END;
		sr_session_send(cb_data, &packet);
	}

	return TRUE;
}

/* driver callbacks */
static int hw_cleanup(void);

static int hw_init(void)
{

	return SR_OK;
}

static int hw_cleanup(void)
{
	GSList *l;

	for (l = dev_insts; l; l = l->next)
		sr_dev_inst_free(l->data);
	g_slist_free(dev_insts);
	dev_insts = NULL;

	sr_session_source_remove(-1);

	return SR_OK;
}

static int hw_dev_open(struct sr_dev_inst *sdi)
{

	if (!(sdi->priv = g_try_malloc0(sizeof(struct session_vdev)))) {
		sr_err("session driver: %s: sdi->priv malloc failed", __func__);
		return SR_ERR_MALLOC;
	}

	dev_insts = g_slist_append(dev_insts, sdi);

	return SR_OK;
}

static int hw_info_get(int info_id, const void **data,
       const struct sr_dev_inst *sdi)
{
	struct session_vdev *vdev;

	switch (info_id) {
	case SR_DI_HWCAPS:
		*data = hwcaps;
		break;
	case SR_DI_CUR_SAMPLERATE:
		if (sdi) {
			vdev = sdi->priv;
			*data = &vdev->samplerate;
		} else
			return SR_ERR;
		break;
	default:
		return SR_ERR_ARG;
	}

	return SR_OK;
}

static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
		const void *value)
{
	struct session_vdev *vdev;
	const uint64_t *tmp_u64;

	vdev = sdi->priv;

	switch (hwcap) {
	case SR_HWCAP_SAMPLERATE:
		tmp_u64 = value;
		vdev->samplerate = *tmp_u64;
		sr_info("session driver: setting samplerate to %" PRIu64,
		        vdev->samplerate);
		break;
	case SR_HWCAP_SESSIONFILE:
		vdev->sessionfile = g_strdup(value);
		sr_info("session driver: setting sessionfile to %s",
		        vdev->sessionfile);
		break;
	case SR_HWCAP_CAPTUREFILE:
		vdev->capturefile = g_strdup(value);
		sr_info("session driver: setting capturefile to %s",
		        vdev->capturefile);
		break;
	case SR_HWCAP_CAPTURE_UNITSIZE:
		tmp_u64 = value;
		vdev->unitsize = *tmp_u64;
		break;
	case SR_HWCAP_CAPTURE_NUM_PROBES:
		tmp_u64 = value;
		vdev->num_probes = *tmp_u64;
		break;
	default:
		sr_err("session driver: %s: unknown capability %d requested",
		       __func__, hwcap);
		return SR_ERR;
	}

	return SR_OK;
}

static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
		void *cb_data)
{
	struct zip_stat zs;
	struct session_vdev *vdev;
	struct sr_datafeed_header *header;
	struct sr_datafeed_packet *packet;
	struct sr_datafeed_meta_logic meta;
	int ret;

	vdev = sdi->priv;

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

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

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

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

	/* freewheeling source */
	sr_session_source_add(-1, 0, 0, receive_data, cb_data);

	if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) {
		sr_err("session driver: %s: packet malloc failed", __func__);
		return SR_ERR_MALLOC;
	}

	if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) {
		sr_err("session driver: %s: header malloc failed", __func__);
		return SR_ERR_MALLOC;
	}

	/* Send header packet to the session bus. */
	packet->type = SR_DF_HEADER;
	packet->payload = (unsigned char *)header;
	header->feed_version = 1;
	gettimeofday(&header->starttime, NULL);
	sr_session_send(cb_data, packet);

	/* Send metadata about the SR_DF_LOGIC packets to come. */
	packet->type = SR_DF_META_LOGIC;
	packet->payload = &meta;
	meta.samplerate = vdev->samplerate;
	meta.num_probes = vdev->num_probes;
	sr_session_send(cb_data, packet);

	g_free(header);
	g_free(packet);

	return SR_OK;
}

SR_PRIV struct sr_dev_driver session_driver = {
	.name = "session",
	.longname = "Session-emulating driver",
	.api_version = 1,
	.init = hw_init,
	.cleanup = hw_cleanup,
	.dev_open = hw_dev_open,
	.dev_close = NULL,
	.info_get = hw_info_get,
	.dev_config_set = hw_dev_config_set,
	.dev_acquisition_start = hw_dev_acquisition_start,
	.dev_acquisition_stop = NULL,
};
Commit	Line	Data
	1	/*
	2	* This file is part of the sigrok project.
	3	*
	4	* Copyright (C) 2010-2012 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 "libsigrok.h"
	27	#include "libsigrok-internal.h"
	28
	29	/* size of payloads sent across the session bus */
	30	#define CHUNKSIZE (512 * 1024)
	31
	32	struct session_vdev {
	33	char *sessionfile;
	34	char *capturefile;
	35	struct zip *archive;
	36	struct zip_file *capfile;
	37	int bytes_read;
	38	uint64_t samplerate;
	39	int unitsize;
	40	int num_probes;
	41	};
	42
	43	static GSList *dev_insts = NULL;
	44	static const int hwcaps[] = {
	45	SR_HWCAP_CAPTUREFILE,
	46	SR_HWCAP_CAPTURE_UNITSIZE,
	47	0,
	48	};
	49
	50	static int receive_data(int fd, int revents, void *cb_data)
	51	{
	52	struct sr_dev_inst *sdi;
	53	struct session_vdev *vdev;
	54	struct sr_datafeed_packet packet;
	55	struct sr_datafeed_logic logic;
	56	GSList *l;
	57	void *buf;
	58	int ret, got_data;
	59
	60	/* Avoid compiler warnings. */
	61	(void)fd;
	62	(void)revents;
	63
	64	sr_dbg("session_driver: feed chunk");
	65
	66	got_data = FALSE;
	67	for (l = dev_insts; l; l = l->next) {
	68	sdi = l->data;
	69	vdev = sdi->priv;
	70	if (!vdev)
	71	/* already done with this instance */
	72	continue;
	73
	74	if (!(buf = g_try_malloc(CHUNKSIZE))) {
	75	sr_err("session driver: %s: buf malloc failed", __func__);
	76	return FALSE;
	77	}
	78
	79	ret = zip_fread(vdev->capfile, buf, CHUNKSIZE);
	80	if (ret > 0) {
	81	got_data = TRUE;
	82	packet.type = SR_DF_LOGIC;
	83	packet.payload = &logic;
	84	logic.length = ret;
	85	logic.unitsize = vdev->unitsize;
	86	logic.data = buf;
	87	vdev->bytes_read += ret;
	88	sr_session_send(cb_data, &packet);
	89	} else {
	90	/* done with this capture file */
	91	zip_fclose(vdev->capfile);
	92	g_free(vdev->capturefile);
	93	g_free(vdev);
	94	sdi->priv = NULL;
	95	}
	96	}
	97
	98	if (!got_data) {
	99	packet.type = SR_DF_END;
	100	sr_session_send(cb_data, &packet);
	101	}
	102
	103	return TRUE;
	104	}
	105
	106	/* driver callbacks */
	107	static int hw_cleanup(void);
	108
	109	static int hw_init(void)
	110	{
	111
	112	return SR_OK;
	113	}
	114
	115	static int hw_cleanup(void)
	116	{
	117	GSList *l;
	118
	119	for (l = dev_insts; l; l = l->next)
	120	sr_dev_inst_free(l->data);
	121	g_slist_free(dev_insts);
	122	dev_insts = NULL;
	123
	124	sr_session_source_remove(-1);
	125
	126	return SR_OK;
	127	}
	128
	129	static int hw_dev_open(struct sr_dev_inst *sdi)
	130	{
	131
	132	if (!(sdi->priv = g_try_malloc0(sizeof(struct session_vdev)))) {
	133	sr_err("session driver: %s: sdi->priv malloc failed", __func__);
	134	return SR_ERR_MALLOC;
	135	}
	136
	137	dev_insts = g_slist_append(dev_insts, sdi);
	138
	139	return SR_OK;
	140	}
	141
	142	static int hw_info_get(int info_id, const void **data,
	143	const struct sr_dev_inst *sdi)
	144	{
	145	struct session_vdev *vdev;
	146
	147	switch (info_id) {
	148	case SR_DI_HWCAPS:
	149	*data = hwcaps;
	150	break;
	151	case SR_DI_CUR_SAMPLERATE:
	152	if (sdi) {
	153	vdev = sdi->priv;
	154	*data = &vdev->samplerate;
	155	} else
	156	return SR_ERR;
	157	break;
	158	default:
	159	return SR_ERR_ARG;
	160	}
	161
	162	return SR_OK;
	163	}
	164
	165	static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
	166	const void *value)
	167	{
	168	struct session_vdev *vdev;
	169	const uint64_t *tmp_u64;
	170
	171	vdev = sdi->priv;
	172
	173	switch (hwcap) {
	174	case SR_HWCAP_SAMPLERATE:
	175	tmp_u64 = value;
	176	vdev->samplerate = *tmp_u64;
	177	sr_info("session driver: setting samplerate to %" PRIu64,
	178	vdev->samplerate);
	179	break;
	180	case SR_HWCAP_SESSIONFILE:
	181	vdev->sessionfile = g_strdup(value);
	182	sr_info("session driver: setting sessionfile to %s",
	183	vdev->sessionfile);
	184	break;
	185	case SR_HWCAP_CAPTUREFILE:
	186	vdev->capturefile = g_strdup(value);
	187	sr_info("session driver: setting capturefile to %s",
	188	vdev->capturefile);
	189	break;
	190	case SR_HWCAP_CAPTURE_UNITSIZE:
	191	tmp_u64 = value;
	192	vdev->unitsize = *tmp_u64;
	193	break;
	194	case SR_HWCAP_CAPTURE_NUM_PROBES:
	195	tmp_u64 = value;
	196	vdev->num_probes = *tmp_u64;
	197	break;
	198	default:
	199	sr_err("session driver: %s: unknown capability %d requested",
	200	__func__, hwcap);
	201	return SR_ERR;
	202	}
	203
	204	return SR_OK;
	205	}
	206
	207	static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
	208	void *cb_data)
	209	{
	210	struct zip_stat zs;
	211	struct session_vdev *vdev;
	212	struct sr_datafeed_header *header;
	213	struct sr_datafeed_packet *packet;
	214	struct sr_datafeed_meta_logic meta;
	215	int ret;
	216
	217	vdev = sdi->priv;
	218
	219	sr_info("session_driver: opening archive %s file %s", vdev->sessionfile,
	220	vdev->capturefile);
	221
	222	if (!(vdev->archive = zip_open(vdev->sessionfile, 0, &ret))) {
	223	sr_err("session driver: Failed to open session file '%s': "
	224	"zip error %d\n", vdev->sessionfile, ret);
	225	return SR_ERR;
	226	}
	227
	228	if (zip_stat(vdev->archive, vdev->capturefile, 0, &zs) == -1) {
	229	sr_err("session driver: Failed to check capture file '%s' in "
	230	"session file '%s'.", vdev->capturefile, vdev->sessionfile);
	231	return SR_ERR;
	232	}
	233
	234	if (!(vdev->capfile = zip_fopen(vdev->archive, vdev->capturefile, 0))) {
	235	sr_err("session driver: Failed to open capture file '%s' in "
	236	"session file '%s'.", vdev->capturefile, vdev->sessionfile);
	237	return SR_ERR;
	238	}
	239
	240	/* freewheeling source */
	241	sr_session_source_add(-1, 0, 0, receive_data, cb_data);
	242
	243	if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) {
	244	sr_err("session driver: %s: packet malloc failed", __func__);
	245	return SR_ERR_MALLOC;
	246	}
	247
	248	if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) {
	249	sr_err("session driver: %s: header malloc failed", __func__);
	250	return SR_ERR_MALLOC;
	251	}
	252
	253	/* Send header packet to the session bus. */
	254	packet->type = SR_DF_HEADER;
	255	packet->payload = (unsigned char *)header;
	256	header->feed_version = 1;
	257	gettimeofday(&header->starttime, NULL);
	258	sr_session_send(cb_data, packet);
	259
	260	/* Send metadata about the SR_DF_LOGIC packets to come. */
	261	packet->type = SR_DF_META_LOGIC;
	262	packet->payload = &meta;
	263	meta.samplerate = vdev->samplerate;
	264	meta.num_probes = vdev->num_probes;
	265	sr_session_send(cb_data, packet);
	266
	267	g_free(header);
	268	g_free(packet);
	269
	270	return SR_OK;
	271	}
	272
	273	SR_PRIV struct sr_dev_driver session_driver = {
	274	.name = "session",
	275	.longname = "Session-emulating driver",
	276	.api_version = 1,
	277	.init = hw_init,
	278	.cleanup = hw_cleanup,
	279	.dev_open = hw_dev_open,
	280	.dev_close = NULL,
	281	.info_get = hw_info_get,
	282	.dev_config_set = hw_dev_config_set,
	283	.dev_acquisition_start = hw_dev_acquisition_start,
	284	.dev_acquisition_stop = NULL,
	285	};