[libsigrok.git] / src / output / srzip.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2014 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 <stdlib.h>
#include <string.h>
#include <errno.h>
#include <glib.h>
#include <glib/gstdio.h>
#include <zip.h>
#include <libsigrok/libsigrok.h>
#include "libsigrok-internal.h"

#define LOG_PREFIX "output/srzip"

struct out_context {
	gboolean zip_created;
	uint64_t samplerate;
	char *filename;
	gint analog_offset;
};

static int init(struct sr_output *o, GHashTable *options)
{
	struct out_context *outc;

	(void)options;

	if (!o->filename || o->filename[0] == '\0') {
		sr_info("srzip output module requires a file name, cannot save.");
		return SR_ERR_ARG;
	}

	outc = g_malloc0(sizeof(struct out_context));
	outc->filename = g_strdup(o->filename);
	o->priv = outc;

	return SR_OK;
}

static int zip_create(const struct sr_output *o)
{
	struct out_context *outc;
	struct zip *zipfile;
	struct zip_source *versrc, *metasrc;
	struct sr_channel *ch;
	GVariant *gvar;
	GKeyFile *meta;
	GSList *l;
	const char *devgroup;
	char *s, *metabuf;
	gsize metalen;
	guint logic_channels = 0, analog_channels = 0;
	gint min_analog_index;

	outc = o->priv;

	if (outc->samplerate == 0 && sr_config_get(o->sdi->driver, o->sdi, NULL,
					SR_CONF_SAMPLERATE, &gvar) == SR_OK) {
		outc->samplerate = g_variant_get_uint64(gvar);
		g_variant_unref(gvar);
	}

	/* Quietly delete it first, libzip wants replace ops otherwise. */
	g_unlink(outc->filename);
	zipfile = zip_open(outc->filename, ZIP_CREATE, NULL);
	if (!zipfile)
		return SR_ERR;

	/* "version" */
	versrc = zip_source_buffer(zipfile, "2", 1, FALSE);
	if (zip_add(zipfile, "version", versrc) < 0) {
		sr_err("Error saving version into zipfile: %s",
			zip_strerror(zipfile));
		zip_source_free(versrc);
		zip_discard(zipfile);
		return SR_ERR;
	}

	/* init "metadata" */
	meta = g_key_file_new();

	g_key_file_set_string(meta, "global", "sigrok version",
			SR_PACKAGE_VERSION_STRING);

	devgroup = "device 1";
	g_key_file_set_string(meta, devgroup, "capturefile", "logic-1");

	s = sr_samplerate_string(outc->samplerate);
	g_key_file_set_string(meta, devgroup, "samplerate", s);
	g_free(s);

	min_analog_index = -1;

	for (l = o->sdi->channels; l; l = l->next) {
		ch = l->data;
		switch (ch->type) {
		case SR_CHANNEL_LOGIC:
			logic_channels++;
			break;
		case SR_CHANNEL_ANALOG:
			if (min_analog_index == -1 ||
					ch->index < min_analog_index)
				min_analog_index = ch->index;
			analog_channels++;
			break;
		}
	}

	outc->analog_offset = logic_channels - min_analog_index + 1;

	g_key_file_set_integer(meta, devgroup, "total probes", logic_channels);
	g_key_file_set_integer(meta, devgroup, "total analog", analog_channels);

	for (l = o->sdi->channels; l; l = l->next) {
		ch = l->data;
		switch (ch->type) {
		case SR_CHANNEL_LOGIC:
			s = g_strdup_printf("probe%d", ch->index + 1);
			break;
		case SR_CHANNEL_ANALOG:
			s = g_strdup_printf("analog%d", ch->index + outc->analog_offset);
			break;
		}
		if (ch->enabled)
			g_key_file_set_string(meta, devgroup, s, ch->name);
		g_free(s);
	}

	metabuf = g_key_file_to_data(meta, &metalen, NULL);
	g_key_file_free(meta);

	metasrc = zip_source_buffer(zipfile, metabuf, metalen, FALSE);
	if (zip_add(zipfile, "metadata", metasrc) < 0) {
		sr_err("Error saving metadata into zipfile: %s",
			zip_strerror(zipfile));
		zip_source_free(metasrc);
		zip_discard(zipfile);
		g_free(metabuf);
		return SR_ERR;
	}

	if (zip_close(zipfile) < 0) {
		sr_err("Error saving zipfile: %s", zip_strerror(zipfile));
		zip_discard(zipfile);
		g_free(metabuf);
		return SR_ERR;
	}
	g_free(metabuf);

	return SR_OK;
}

static int zip_append(const struct sr_output *o, unsigned char *buf,
		int unitsize, int length)
{
	struct out_context *outc;
	struct zip *archive;
	struct zip_source *logicsrc;
	int64_t i, num_files;
	struct zip_stat zs;
	struct zip_source *metasrc;
	GKeyFile *kf;
	GError *error;
	uint64_t chunk_num;
	const char *entry_name;
	char *metabuf;
	gsize metalen;
	char *chunkname;
	unsigned int next_chunk_num;

	outc = o->priv;
	if (!(archive = zip_open(outc->filename, 0, NULL)))
		return SR_ERR;

	if (zip_stat(archive, "metadata", 0, &zs) < 0) {
		sr_err("Failed to open metadata: %s", zip_strerror(archive));
		zip_discard(archive);
		return SR_ERR;
	}
	kf = sr_sessionfile_read_metadata(archive, &zs);
	if (!kf) {
		zip_discard(archive);
		return SR_ERR_DATA;
	}
	/*
	 * If the file was only initialized but doesn't yet have any
	 * data it in, it won't have a unitsize field in metadata yet.
	 */
	error = NULL;
	metabuf = NULL;
	if (!g_key_file_has_key(kf, "device 1", "unitsize", &error)) {
		if (error && error->code != G_KEY_FILE_ERROR_KEY_NOT_FOUND) {
			sr_err("Failed to check unitsize key: %s", error->message);
			g_error_free(error);
			g_key_file_free(kf);
			zip_discard(archive);
			return SR_ERR;
		}
		g_clear_error(&error);

		/* Add unitsize field. */
		g_key_file_set_integer(kf, "device 1", "unitsize", unitsize);
		metabuf = g_key_file_to_data(kf, &metalen, NULL);
		metasrc = zip_source_buffer(archive, metabuf, metalen, FALSE);

		if (zip_replace(archive, zs.index, metasrc) < 0) {
			sr_err("Failed to replace metadata: %s",
				zip_strerror(archive));
			g_key_file_free(kf);
			zip_source_free(metasrc);
			zip_discard(archive);
			g_free(metabuf);
			return SR_ERR;
		}
	}
	g_key_file_free(kf);

	next_chunk_num = 1;
	num_files = zip_get_num_entries(archive, 0);
	for (i = 0; i < num_files; i++) {
		entry_name = zip_get_name(archive, i, 0);
		if (!entry_name || strncmp(entry_name, "logic-1", 7) != 0)
			continue;
		if (entry_name[7] == '\0') {
			/* This file has no extra chunks, just a single "logic-1".
			 * Rename it to "logic-1-1" * and continue with chunk 2. */
			if (zip_rename(archive, i, "logic-1-1") < 0) {
				sr_err("Failed to rename 'logic-1' to 'logic-1-1': %s",
					zip_strerror(archive));
				zip_discard(archive);
				g_free(metabuf);
				return SR_ERR;
			}
			next_chunk_num = 2;
			break;
		} else if (entry_name[7] == '-') {
			chunk_num = g_ascii_strtoull(entry_name + 8, NULL, 10);
			if (chunk_num < G_MAXINT && chunk_num >= next_chunk_num)
				next_chunk_num = chunk_num + 1;
		}
	}

	if (length % unitsize != 0) {
		sr_warn("Chunk size %d not a multiple of the"
			" unit size %d.", length, unitsize);
	}
	logicsrc = zip_source_buffer(archive, buf, length, FALSE);
	chunkname = g_strdup_printf("logic-1-%u", next_chunk_num);
	i = zip_add(archive, chunkname, logicsrc);
	g_free(chunkname);
	if (i < 0) {
		sr_err("Failed to add chunk 'logic-1-%u': %s",
			next_chunk_num, zip_strerror(archive));
		zip_source_free(logicsrc);
		zip_discard(archive);
		g_free(metabuf);
		return SR_ERR;
	}
	if (zip_close(archive) < 0) {
		sr_err("Error saving session file: %s", zip_strerror(archive));
		zip_discard(archive);
		g_free(metabuf);
		return SR_ERR;
	}
	g_free(metabuf);

	return SR_OK;
}

static int zip_append_analog(const struct sr_output *o,
		const struct sr_datafeed_analog *analog)
{
	struct out_context *outc;
	struct zip *archive;
	struct zip_source *analogsrc;
	int64_t i, num_files;
	struct zip_stat zs;
	uint64_t chunk_num;
	const char *entry_name;
	char *basename;
	gsize baselen;
	struct sr_channel *channel;
	float *chunkbuf;
	gsize chunksize;
	char *chunkname;
	unsigned int next_chunk_num;

	outc = o->priv;
	if (!(archive = zip_open(outc->filename, 0, NULL)))
		return SR_ERR;

	if (zip_stat(archive, "metadata", 0, &zs) < 0) {
		sr_err("Failed to open metadata: %s", zip_strerror(archive));
		zip_discard(archive);
		return SR_ERR;
	}

	/* TODO: support packets covering multiple channels */
	if (g_slist_length(analog->meaning->channels) != 1) {
		sr_err("Analog packets covering multiple channels not supported yet");
		return SR_ERR;
	}
	channel = analog->meaning->channels->data;

	basename = g_strdup_printf("analog-1-%u",
			channel->index + outc->analog_offset);
	baselen = strlen(basename);
	next_chunk_num = 1;
	num_files = zip_get_num_entries(archive, 0);
	for (i = 0; i < num_files; i++) {
		entry_name = zip_get_name(archive, i, 0);
		if (!entry_name || strncmp(entry_name, basename, baselen) != 0) {
			continue;
		} else if (entry_name[baselen] == '-') {
			chunk_num = g_ascii_strtoull(entry_name + baselen + 1, NULL, 10);
			if (chunk_num < G_MAXINT && chunk_num >= next_chunk_num)
				next_chunk_num = chunk_num + 1;
		}
	}

	chunksize = sizeof(float) * analog->num_samples;
	if (!(chunkbuf = g_try_malloc(chunksize)))
		return SR_ERR;
	if (sr_analog_to_float(analog, chunkbuf) != SR_OK)
		return SR_ERR;

	analogsrc = zip_source_buffer(archive, chunkbuf, chunksize, FALSE);
	chunkname = g_strdup_printf("%s-%u", basename, next_chunk_num);
	i = zip_add(archive, chunkname, analogsrc);
	g_free(chunkname);
	if (i < 0) {
		sr_err("Failed to add chunk '%s': %s", chunkname, zip_strerror(archive));
		zip_source_free(analogsrc);
		zip_discard(archive);
		return SR_ERR;
	}
	if (zip_close(archive) < 0) {
		sr_err("Error saving session file: %s", zip_strerror(archive));
		zip_discard(archive);
		return SR_ERR;
	}

	return SR_OK;
}

static int receive(const struct sr_output *o, const struct sr_datafeed_packet *packet,
		GString **out)
{
	struct out_context *outc;
	const struct sr_datafeed_meta *meta;
	const struct sr_datafeed_logic *logic;
	const struct sr_datafeed_analog *analog;
	const struct sr_config *src;
	GSList *l;

	int ret;

	*out = NULL;
	if (!o || !o->sdi || !(outc = o->priv))
		return SR_ERR_ARG;

	switch (packet->type) {
	case SR_DF_META:
		meta = packet->payload;
		for (l = meta->config; l; l = l->next) {
			src = l->data;
			if (src->key != SR_CONF_SAMPLERATE)
				continue;
			outc->samplerate = g_variant_get_uint64(src->data);
		}
		break;
	case SR_DF_LOGIC:
		if (!outc->zip_created) {
			if ((ret = zip_create(o)) != SR_OK)
				return ret;
			outc->zip_created = TRUE;
		}
		logic = packet->payload;
		ret = zip_append(o, logic->data, logic->unitsize, logic->length);
		if (ret != SR_OK)
			return ret;
		break;
	case SR_DF_ANALOG:
		if (!outc->zip_created) {
			if ((ret = zip_create(o)) != SR_OK)
				return ret;
			outc->zip_created = TRUE;
		}
		analog = packet->payload;
		ret = zip_append_analog(o, analog);
		if (ret != SR_OK)
			return ret;
		break;
	}

	return SR_OK;
}

static struct sr_option options[] = {
	ALL_ZERO
};

static const struct sr_option *get_options(void)
{
	if (!options[0].def)
		options[0].def = g_variant_ref_sink(g_variant_new_string(""));

	return options;
}

static int cleanup(struct sr_output *o)
{
	struct out_context *outc;

	outc = o->priv;
	g_variant_unref(options[0].def);
	g_free(outc->filename);
	g_free(outc);
	o->priv = NULL;

	return SR_OK;
}

SR_PRIV struct sr_output_module output_srzip = {
	.id = "srzip",
	.name = "srzip",
	.desc = "srzip session file",
	.exts = (const char*[]){"sr", NULL},
	.flags = SR_OUTPUT_INTERNAL_IO_HANDLING,
	.options = get_options,
	.init = init,
	.receive = receive,
	.cleanup = cleanup,
};
Commit	Line	Data
	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2014 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 <config.h>
	21	#include <stdlib.h>
	22	#include <string.h>
	23	#include <errno.h>
	24	#include <glib.h>
	25	#include <glib/gstdio.h>
	26	#include <zip.h>
	27	#include <libsigrok/libsigrok.h>
	28	#include "libsigrok-internal.h"
	29
	30	#define LOG_PREFIX "output/srzip"
	31
	32	struct out_context {
	33	gboolean zip_created;
	34	uint64_t samplerate;
	35	char *filename;
	36	gint analog_offset;
	37	};
	38
	39	static int init(struct sr_output o, GHashTable options)
	40	{
	41	struct out_context *outc;
	42
	43	(void)options;
	44
	45	if (!o->filename \|\| o->filename[0] == '\0') {
	46	sr_info("srzip output module requires a file name, cannot save.");
	47	return SR_ERR_ARG;
	48	}
	49
	50	outc = g_malloc0(sizeof(struct out_context));
	51	outc->filename = g_strdup(o->filename);
	52	o->priv = outc;
	53
	54	return SR_OK;
	55	}
	56
	57	static int zip_create(const struct sr_output *o)
	58	{
	59	struct out_context *outc;
	60	struct zip *zipfile;
	61	struct zip_source versrc, metasrc;
	62	struct sr_channel *ch;
	63	GVariant *gvar;
	64	GKeyFile *meta;
	65	GSList *l;
	66	const char *devgroup;
	67	char s, metabuf;
	68	gsize metalen;
	69	guint logic_channels = 0, analog_channels = 0;
	70	gint min_analog_index;
	71
	72	outc = o->priv;
	73
	74	if (outc->samplerate == 0 && sr_config_get(o->sdi->driver, o->sdi, NULL,
	75	SR_CONF_SAMPLERATE, &gvar) == SR_OK) {
	76	outc->samplerate = g_variant_get_uint64(gvar);
	77	g_variant_unref(gvar);
	78	}
	79
	80	/* Quietly delete it first, libzip wants replace ops otherwise. */
	81	g_unlink(outc->filename);
	82	zipfile = zip_open(outc->filename, ZIP_CREATE, NULL);
	83	if (!zipfile)
	84	return SR_ERR;
	85
	86	/* "version" */
	87	versrc = zip_source_buffer(zipfile, "2", 1, FALSE);
	88	if (zip_add(zipfile, "version", versrc) < 0) {
	89	sr_err("Error saving version into zipfile: %s",
	90	zip_strerror(zipfile));
	91	zip_source_free(versrc);
	92	zip_discard(zipfile);
	93	return SR_ERR;
	94	}
	95
	96	/* init "metadata" */
	97	meta = g_key_file_new();
	98
	99	g_key_file_set_string(meta, "global", "sigrok version",
	100	SR_PACKAGE_VERSION_STRING);
	101
	102	devgroup = "device 1";
	103	g_key_file_set_string(meta, devgroup, "capturefile", "logic-1");
	104
	105	s = sr_samplerate_string(outc->samplerate);
	106	g_key_file_set_string(meta, devgroup, "samplerate", s);
	107	g_free(s);
	108
	109	min_analog_index = -1;
	110
	111	for (l = o->sdi->channels; l; l = l->next) {
	112	ch = l->data;
	113	switch (ch->type) {
	114	case SR_CHANNEL_LOGIC:
	115	logic_channels++;
	116	break;
	117	case SR_CHANNEL_ANALOG:
	118	if (min_analog_index == -1 \|\|
	119	ch->index < min_analog_index)
	120	min_analog_index = ch->index;
	121	analog_channels++;
	122	break;
	123	}
	124	}
	125
	126	outc->analog_offset = logic_channels - min_analog_index + 1;
	127
	128	g_key_file_set_integer(meta, devgroup, "total probes", logic_channels);
	129	g_key_file_set_integer(meta, devgroup, "total analog", analog_channels);
	130
	131	for (l = o->sdi->channels; l; l = l->next) {
	132	ch = l->data;
	133	switch (ch->type) {
	134	case SR_CHANNEL_LOGIC:
	135	s = g_strdup_printf("probe%d", ch->index + 1);
	136	break;
	137	case SR_CHANNEL_ANALOG:
	138	s = g_strdup_printf("analog%d", ch->index + outc->analog_offset);
	139	break;
	140	}
	141	if (ch->enabled)
	142	g_key_file_set_string(meta, devgroup, s, ch->name);
	143	g_free(s);
	144	}
	145
	146	metabuf = g_key_file_to_data(meta, &metalen, NULL);
	147	g_key_file_free(meta);
	148
	149	metasrc = zip_source_buffer(zipfile, metabuf, metalen, FALSE);
	150	if (zip_add(zipfile, "metadata", metasrc) < 0) {
	151	sr_err("Error saving metadata into zipfile: %s",
	152	zip_strerror(zipfile));
	153	zip_source_free(metasrc);
	154	zip_discard(zipfile);
	155	g_free(metabuf);
	156	return SR_ERR;
	157	}
	158
	159	if (zip_close(zipfile) < 0) {
	160	sr_err("Error saving zipfile: %s", zip_strerror(zipfile));
	161	zip_discard(zipfile);
	162	g_free(metabuf);
	163	return SR_ERR;
	164	}
	165	g_free(metabuf);
	166
	167	return SR_OK;
	168	}
	169
	170	static int zip_append(const struct sr_output o, unsigned char buf,
	171	int unitsize, int length)
	172	{
	173	struct out_context *outc;
	174	struct zip *archive;
	175	struct zip_source *logicsrc;
	176	int64_t i, num_files;
	177	struct zip_stat zs;
	178	struct zip_source *metasrc;
	179	GKeyFile *kf;
	180	GError *error;
	181	uint64_t chunk_num;
	182	const char *entry_name;
	183	char *metabuf;
	184	gsize metalen;
	185	char *chunkname;
	186	unsigned int next_chunk_num;
	187
	188	outc = o->priv;
	189	if (!(archive = zip_open(outc->filename, 0, NULL)))
	190	return SR_ERR;
	191
	192	if (zip_stat(archive, "metadata", 0, &zs) < 0) {
	193	sr_err("Failed to open metadata: %s", zip_strerror(archive));
	194	zip_discard(archive);
	195	return SR_ERR;
	196	}
	197	kf = sr_sessionfile_read_metadata(archive, &zs);
	198	if (!kf) {
	199	zip_discard(archive);
	200	return SR_ERR_DATA;
	201	}
	202	/*
	203	* If the file was only initialized but doesn't yet have any
	204	* data it in, it won't have a unitsize field in metadata yet.
	205	*/
	206	error = NULL;
	207	metabuf = NULL;
	208	if (!g_key_file_has_key(kf, "device 1", "unitsize", &error)) {
	209	if (error && error->code != G_KEY_FILE_ERROR_KEY_NOT_FOUND) {
	210	sr_err("Failed to check unitsize key: %s", error->message);
	211	g_error_free(error);
	212	g_key_file_free(kf);
	213	zip_discard(archive);
	214	return SR_ERR;
	215	}
	216	g_clear_error(&error);
	217
	218	/* Add unitsize field. */
	219	g_key_file_set_integer(kf, "device 1", "unitsize", unitsize);
	220	metabuf = g_key_file_to_data(kf, &metalen, NULL);
	221	metasrc = zip_source_buffer(archive, metabuf, metalen, FALSE);
	222
	223	if (zip_replace(archive, zs.index, metasrc) < 0) {
	224	sr_err("Failed to replace metadata: %s",
	225	zip_strerror(archive));
	226	g_key_file_free(kf);
	227	zip_source_free(metasrc);
	228	zip_discard(archive);
	229	g_free(metabuf);
	230	return SR_ERR;
	231	}
	232	}
	233	g_key_file_free(kf);
	234
	235	next_chunk_num = 1;
	236	num_files = zip_get_num_entries(archive, 0);
	237	for (i = 0; i < num_files; i++) {
	238	entry_name = zip_get_name(archive, i, 0);
	239	if (!entry_name \|\| strncmp(entry_name, "logic-1", 7) != 0)
	240	continue;
	241	if (entry_name[7] == '\0') {
	242	/* This file has no extra chunks, just a single "logic-1".
	243	* Rename it to "logic-1-1" * and continue with chunk 2. */
	244	if (zip_rename(archive, i, "logic-1-1") < 0) {
	245	sr_err("Failed to rename 'logic-1' to 'logic-1-1': %s",
	246	zip_strerror(archive));
	247	zip_discard(archive);
	248	g_free(metabuf);
	249	return SR_ERR;
	250	}
	251	next_chunk_num = 2;
	252	break;
	253	} else if (entry_name[7] == '-') {
	254	chunk_num = g_ascii_strtoull(entry_name + 8, NULL, 10);
	255	if (chunk_num < G_MAXINT && chunk_num >= next_chunk_num)
	256	next_chunk_num = chunk_num + 1;
	257	}
	258	}
	259
	260	if (length % unitsize != 0) {
	261	sr_warn("Chunk size %d not a multiple of the"
	262	" unit size %d.", length, unitsize);
	263	}
	264	logicsrc = zip_source_buffer(archive, buf, length, FALSE);
	265	chunkname = g_strdup_printf("logic-1-%u", next_chunk_num);
	266	i = zip_add(archive, chunkname, logicsrc);
	267	g_free(chunkname);
	268	if (i < 0) {
	269	sr_err("Failed to add chunk 'logic-1-%u': %s",
	270	next_chunk_num, zip_strerror(archive));
	271	zip_source_free(logicsrc);
	272	zip_discard(archive);
	273	g_free(metabuf);
	274	return SR_ERR;
	275	}
	276	if (zip_close(archive) < 0) {
	277	sr_err("Error saving session file: %s", zip_strerror(archive));
	278	zip_discard(archive);
	279	g_free(metabuf);
	280	return SR_ERR;
	281	}
	282	g_free(metabuf);
	283
	284	return SR_OK;
	285	}
	286
	287	static int zip_append_analog(const struct sr_output *o,
	288	const struct sr_datafeed_analog *analog)
	289	{
	290	struct out_context *outc;
	291	struct zip *archive;
	292	struct zip_source *analogsrc;
	293	int64_t i, num_files;
	294	struct zip_stat zs;
	295	uint64_t chunk_num;
	296	const char *entry_name;
	297	char *basename;
	298	gsize baselen;
	299	struct sr_channel *channel;
	300	float *chunkbuf;
	301	gsize chunksize;
	302	char *chunkname;
	303	unsigned int next_chunk_num;
	304
	305	outc = o->priv;
	306	if (!(archive = zip_open(outc->filename, 0, NULL)))
	307	return SR_ERR;
	308
	309	if (zip_stat(archive, "metadata", 0, &zs) < 0) {
	310	sr_err("Failed to open metadata: %s", zip_strerror(archive));
	311	zip_discard(archive);
	312	return SR_ERR;
	313	}
	314
	315	/* TODO: support packets covering multiple channels */
	316	if (g_slist_length(analog->meaning->channels) != 1) {
	317	sr_err("Analog packets covering multiple channels not supported yet");
	318	return SR_ERR;
	319	}
	320	channel = analog->meaning->channels->data;
	321
	322	basename = g_strdup_printf("analog-1-%u",
	323	channel->index + outc->analog_offset);
	324	baselen = strlen(basename);
	325	next_chunk_num = 1;
	326	num_files = zip_get_num_entries(archive, 0);
	327	for (i = 0; i < num_files; i++) {
	328	entry_name = zip_get_name(archive, i, 0);
	329	if (!entry_name \|\| strncmp(entry_name, basename, baselen) != 0) {
	330	continue;
	331	} else if (entry_name[baselen] == '-') {
	332	chunk_num = g_ascii_strtoull(entry_name + baselen + 1, NULL, 10);
	333	if (chunk_num < G_MAXINT && chunk_num >= next_chunk_num)
	334	next_chunk_num = chunk_num + 1;
	335	}
	336	}
	337
	338	chunksize = sizeof(float) * analog->num_samples;
	339	if (!(chunkbuf = g_try_malloc(chunksize)))
	340	return SR_ERR;
	341	if (sr_analog_to_float(analog, chunkbuf) != SR_OK)
	342	return SR_ERR;
	343
	344	analogsrc = zip_source_buffer(archive, chunkbuf, chunksize, FALSE);
	345	chunkname = g_strdup_printf("%s-%u", basename, next_chunk_num);
	346	i = zip_add(archive, chunkname, analogsrc);
	347	g_free(chunkname);
	348	if (i < 0) {
	349	sr_err("Failed to add chunk '%s': %s", chunkname, zip_strerror(archive));
	350	zip_source_free(analogsrc);
	351	zip_discard(archive);
	352	return SR_ERR;
	353	}
	354	if (zip_close(archive) < 0) {
	355	sr_err("Error saving session file: %s", zip_strerror(archive));
	356	zip_discard(archive);
	357	return SR_ERR;
	358	}
	359
	360	return SR_OK;
	361	}
	362
	363	static int receive(const struct sr_output o, const struct sr_datafeed_packet packet,
	364	GString **out)
	365	{
	366	struct out_context *outc;
	367	const struct sr_datafeed_meta *meta;
	368	const struct sr_datafeed_logic *logic;
	369	const struct sr_datafeed_analog *analog;
	370	const struct sr_config *src;
	371	GSList *l;
	372
	373	int ret;
	374
	375	*out = NULL;
	376	if (!o \|\| !o->sdi \|\| !(outc = o->priv))
	377	return SR_ERR_ARG;
	378
	379	switch (packet->type) {
	380	case SR_DF_META:
	381	meta = packet->payload;
	382	for (l = meta->config; l; l = l->next) {
	383	src = l->data;
	384	if (src->key != SR_CONF_SAMPLERATE)
	385	continue;
	386	outc->samplerate = g_variant_get_uint64(src->data);
	387	}
	388	break;
	389	case SR_DF_LOGIC:
	390	if (!outc->zip_created) {
	391	if ((ret = zip_create(o)) != SR_OK)
	392	return ret;
	393	outc->zip_created = TRUE;
	394	}
	395	logic = packet->payload;
	396	ret = zip_append(o, logic->data, logic->unitsize, logic->length);
	397	if (ret != SR_OK)
	398	return ret;
	399	break;
	400	case SR_DF_ANALOG:
	401	if (!outc->zip_created) {
	402	if ((ret = zip_create(o)) != SR_OK)
	403	return ret;
	404	outc->zip_created = TRUE;
	405	}
	406	analog = packet->payload;
	407	ret = zip_append_analog(o, analog);
	408	if (ret != SR_OK)
	409	return ret;
	410	break;
	411	}
	412
	413	return SR_OK;
	414	}
	415
	416	static struct sr_option options[] = {
	417	ALL_ZERO
	418	};
	419
	420	static const struct sr_option *get_options(void)
	421	{
	422	if (!options[0].def)
	423	options[0].def = g_variant_ref_sink(g_variant_new_string(""));
	424
	425	return options;
	426	}
	427
	428	static int cleanup(struct sr_output *o)
	429	{
	430	struct out_context *outc;
	431
	432	outc = o->priv;
	433	g_variant_unref(options[0].def);
	434	g_free(outc->filename);
	435	g_free(outc);
	436	o->priv = NULL;
	437
	438	return SR_OK;
	439	}
	440
	441	SR_PRIV struct sr_output_module output_srzip = {
	442	.id = "srzip",
	443	.name = "srzip",
	444	.desc = "srzip session file",
	445	.exts = (const char*[]){"sr", NULL},
	446	.flags = SR_OUTPUT_INTERNAL_IO_HANDLING,
	447	.options = get_options,
	448	.init = init,
	449	.receive = receive,
	450	.cleanup = cleanup,
	451	};