[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 first_analog_index;
	gint *analog_index_map;
};

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, enabled_logic_channels = 0;
	guint enabled_analog_channels = 0;
	guint 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";

	for (l = o->sdi->channels; l; l = l->next) {
		ch = l->data;

		switch (ch->type) {
		case SR_CHANNEL_LOGIC:
			if (ch->enabled)
				enabled_logic_channels++;
			logic_channels++;
			break;
		case SR_CHANNEL_ANALOG:
			if (ch->enabled)
				enabled_analog_channels++;
			break;
		}
	}

	/* When reading the file, the first index of the analog channels
	 * can only be deduced through the "total probes" count, so the
	 * first analog index must follow the last logic one, enabled or not. */
	if (enabled_logic_channels > 0)
		outc->first_analog_index = logic_channels + 1;
	else
		outc->first_analog_index = 1;

	/* Only set capturefile and probes if we will actually save logic data. */
	if (enabled_logic_channels > 0) {
		g_key_file_set_string(meta, devgroup, "capturefile", "logic-1");
		g_key_file_set_integer(meta, devgroup, "total probes", logic_channels);
	}

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

	g_key_file_set_integer(meta, devgroup, "total analog", enabled_analog_channels);

	/* Make the array one entry larger than needed so we can use the final
	 * entry as terminator, which is set to -1. */
	outc->analog_index_map = g_malloc0(sizeof(gint) * (enabled_analog_channels + 1));
	outc->analog_index_map[enabled_analog_channels] = -1;

	index = 0;
	for (l = o->sdi->channels; l; l = l->next) {
		ch = l->data;
		if (!ch->enabled)
			continue;

		switch (ch->type) {
		case SR_CHANNEL_LOGIC:
			s = g_strdup_printf("probe%d", ch->index + 1);
			break;
		case SR_CHANNEL_ANALOG:
			outc->analog_index_map[index] = ch->index;
			s = g_strdup_printf("analog%d", outc->first_analog_index + index);
			index++;
			break;
		}
		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, index;

	outc = o->priv;

	/* 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;

	/* When reading the file, analog channels must be consecutive.
	 * Thus we need a global channel index map as we don't know in
	 * which order the channel data comes in. */
	for (index = 0; outc->analog_index_map[index] != -1; index++)
		if (outc->analog_index_map[index] == channel->index)
			break;
	if (outc->analog_index_map[index] == -1)
		return SR_ERR_ARG;  /* Channel index was not in the list */

	index += outc->first_analog_index;

	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));
		goto err_zip_discard;
	}

	basename = g_strdup_printf("analog-1-%u", index);
	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)))
		goto err_free_basename;

	if (sr_analog_to_float(analog, chunkbuf) != SR_OK)
		goto err_free_chunkbuf;

	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);
		goto err_free_chunkbuf;
	}
	if (zip_close(archive) < 0) {
		sr_err("Error saving session file: %s", zip_strerror(archive));
		goto err_free_chunkbuf;
	}

	g_free(basename);
	g_free(chunkbuf);

	return SR_OK;

err_free_chunkbuf:
	g_free(chunkbuf);
err_free_basename:
	g_free(basename);
err_zip_discard:
	zip_discard(archive);

	return SR_ERR;
}

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->analog_index_map);
	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 first_analog_index;
	37	gint *analog_index_map;
	38	};
	39
	40	static int init(struct sr_output o, GHashTable options)
	41	{
	42	struct out_context *outc;
	43
	44	(void)options;
	45
	46	if (!o->filename \|\| o->filename[0] == '\0') {
	47	sr_info("srzip output module requires a file name, cannot save.");
	48	return SR_ERR_ARG;
	49	}
	50
	51	outc = g_malloc0(sizeof(struct out_context));
	52	outc->filename = g_strdup(o->filename);
	53	o->priv = outc;
	54
	55	return SR_OK;
	56	}
	57
	58	static int zip_create(const struct sr_output *o)
	59	{
	60	struct out_context *outc;
	61	struct zip *zipfile;
	62	struct zip_source versrc, metasrc;
	63	struct sr_channel *ch;
	64	GVariant *gvar;
	65	GKeyFile *meta;
	66	GSList *l;
	67	const char *devgroup;
	68	char s, metabuf;
	69	gsize metalen;
	70	guint logic_channels = 0, enabled_logic_channels = 0;
	71	guint enabled_analog_channels = 0;
	72	guint index;
	73
	74	outc = o->priv;
	75
	76	if (outc->samplerate == 0 && sr_config_get(o->sdi->driver, o->sdi, NULL,
	77	SR_CONF_SAMPLERATE, &gvar) == SR_OK) {
	78	outc->samplerate = g_variant_get_uint64(gvar);
	79	g_variant_unref(gvar);
	80	}
	81
	82	/* Quietly delete it first, libzip wants replace ops otherwise. */
	83	g_unlink(outc->filename);
	84	zipfile = zip_open(outc->filename, ZIP_CREATE, NULL);
	85	if (!zipfile)
	86	return SR_ERR;
	87
	88	/* "version" */
	89	versrc = zip_source_buffer(zipfile, "2", 1, FALSE);
	90	if (zip_add(zipfile, "version", versrc) < 0) {
	91	sr_err("Error saving version into zipfile: %s",
	92	zip_strerror(zipfile));
	93	zip_source_free(versrc);
	94	zip_discard(zipfile);
	95	return SR_ERR;
	96	}
	97
	98	/* init "metadata" */
	99	meta = g_key_file_new();
	100
	101	g_key_file_set_string(meta, "global", "sigrok version",
	102	SR_PACKAGE_VERSION_STRING);
	103
	104	devgroup = "device 1";
	105
	106	for (l = o->sdi->channels; l; l = l->next) {
	107	ch = l->data;
	108
	109	switch (ch->type) {
	110	case SR_CHANNEL_LOGIC:
	111	if (ch->enabled)
	112	enabled_logic_channels++;
	113	logic_channels++;
	114	break;
	115	case SR_CHANNEL_ANALOG:
	116	if (ch->enabled)
	117	enabled_analog_channels++;
	118	break;
	119	}
	120	}
	121
	122	/* When reading the file, the first index of the analog channels
	123	* can only be deduced through the "total probes" count, so the
	124	* first analog index must follow the last logic one, enabled or not. */
	125	if (enabled_logic_channels > 0)
	126	outc->first_analog_index = logic_channels + 1;
	127	else
	128	outc->first_analog_index = 1;
	129
	130	/* Only set capturefile and probes if we will actually save logic data. */
	131	if (enabled_logic_channels > 0) {
	132	g_key_file_set_string(meta, devgroup, "capturefile", "logic-1");
	133	g_key_file_set_integer(meta, devgroup, "total probes", logic_channels);
	134	}
	135
	136	s = sr_samplerate_string(outc->samplerate);
	137	g_key_file_set_string(meta, devgroup, "samplerate", s);
	138	g_free(s);
	139
	140	g_key_file_set_integer(meta, devgroup, "total analog", enabled_analog_channels);
	141
	142	/* Make the array one entry larger than needed so we can use the final
	143	* entry as terminator, which is set to -1. */
	144	outc->analog_index_map = g_malloc0(sizeof(gint) * (enabled_analog_channels + 1));
	145	outc->analog_index_map[enabled_analog_channels] = -1;
	146
	147	index = 0;
	148	for (l = o->sdi->channels; l; l = l->next) {
	149	ch = l->data;
	150	if (!ch->enabled)
	151	continue;
	152
	153	switch (ch->type) {
	154	case SR_CHANNEL_LOGIC:
	155	s = g_strdup_printf("probe%d", ch->index + 1);
	156	break;
	157	case SR_CHANNEL_ANALOG:
	158	outc->analog_index_map[index] = ch->index;
	159	s = g_strdup_printf("analog%d", outc->first_analog_index + index);
	160	index++;
	161	break;
	162	}
	163	g_key_file_set_string(meta, devgroup, s, ch->name);
	164	g_free(s);
	165	}
	166
	167	metabuf = g_key_file_to_data(meta, &metalen, NULL);
	168	g_key_file_free(meta);
	169
	170	metasrc = zip_source_buffer(zipfile, metabuf, metalen, FALSE);
	171	if (zip_add(zipfile, "metadata", metasrc) < 0) {
	172	sr_err("Error saving metadata into zipfile: %s",
	173	zip_strerror(zipfile));
	174	zip_source_free(metasrc);
	175	zip_discard(zipfile);
	176	g_free(metabuf);
	177	return SR_ERR;
	178	}
	179
	180	if (zip_close(zipfile) < 0) {
	181	sr_err("Error saving zipfile: %s", zip_strerror(zipfile));
	182	zip_discard(zipfile);
	183	g_free(metabuf);
	184	return SR_ERR;
	185	}
	186	g_free(metabuf);
	187
	188	return SR_OK;
	189	}
	190
	191	static int zip_append(const struct sr_output o, unsigned char buf,
	192	int unitsize, int length)
	193	{
	194	struct out_context *outc;
	195	struct zip *archive;
	196	struct zip_source *logicsrc;
	197	int64_t i, num_files;
	198	struct zip_stat zs;
	199	struct zip_source *metasrc;
	200	GKeyFile *kf;
	201	GError *error;
	202	uint64_t chunk_num;
	203	const char *entry_name;
	204	char *metabuf;
	205	gsize metalen;
	206	char *chunkname;
	207	unsigned int next_chunk_num;
	208
	209	outc = o->priv;
	210	if (!(archive = zip_open(outc->filename, 0, NULL)))
	211	return SR_ERR;
	212
	213	if (zip_stat(archive, "metadata", 0, &zs) < 0) {
	214	sr_err("Failed to open metadata: %s", zip_strerror(archive));
	215	zip_discard(archive);
	216	return SR_ERR;
	217	}
	218	kf = sr_sessionfile_read_metadata(archive, &zs);
	219	if (!kf) {
	220	zip_discard(archive);
	221	return SR_ERR_DATA;
	222	}
	223	/*
	224	* If the file was only initialized but doesn't yet have any
	225	* data it in, it won't have a unitsize field in metadata yet.
	226	*/
	227	error = NULL;
	228	metabuf = NULL;
	229	if (!g_key_file_has_key(kf, "device 1", "unitsize", &error)) {
	230	if (error && error->code != G_KEY_FILE_ERROR_KEY_NOT_FOUND) {
	231	sr_err("Failed to check unitsize key: %s", error->message);
	232	g_error_free(error);
	233	g_key_file_free(kf);
	234	zip_discard(archive);
	235	return SR_ERR;
	236	}
	237	g_clear_error(&error);
	238
	239	/* Add unitsize field. */
	240	g_key_file_set_integer(kf, "device 1", "unitsize", unitsize);
	241	metabuf = g_key_file_to_data(kf, &metalen, NULL);
	242	metasrc = zip_source_buffer(archive, metabuf, metalen, FALSE);
	243
	244	if (zip_replace(archive, zs.index, metasrc) < 0) {
	245	sr_err("Failed to replace metadata: %s",
	246	zip_strerror(archive));
	247	g_key_file_free(kf);
	248	zip_source_free(metasrc);
	249	zip_discard(archive);
	250	g_free(metabuf);
	251	return SR_ERR;
	252	}
	253	}
	254	g_key_file_free(kf);
	255
	256	next_chunk_num = 1;
	257	num_files = zip_get_num_entries(archive, 0);
	258	for (i = 0; i < num_files; i++) {
	259	entry_name = zip_get_name(archive, i, 0);
	260	if (!entry_name \|\| strncmp(entry_name, "logic-1", 7) != 0)
	261	continue;
	262	if (entry_name[7] == '\0') {
	263	/* This file has no extra chunks, just a single "logic-1".
	264	* Rename it to "logic-1-1" * and continue with chunk 2. */
	265	if (zip_rename(archive, i, "logic-1-1") < 0) {
	266	sr_err("Failed to rename 'logic-1' to 'logic-1-1': %s",
	267	zip_strerror(archive));
	268	zip_discard(archive);
	269	g_free(metabuf);
	270	return SR_ERR;
	271	}
	272	next_chunk_num = 2;
	273	break;
	274	} else if (entry_name[7] == '-') {
	275	chunk_num = g_ascii_strtoull(entry_name + 8, NULL, 10);
	276	if (chunk_num < G_MAXINT && chunk_num >= next_chunk_num)
	277	next_chunk_num = chunk_num + 1;
	278	}
	279	}
	280
	281	if (length % unitsize != 0) {
	282	sr_warn("Chunk size %d not a multiple of the"
	283	" unit size %d.", length, unitsize);
	284	}
	285	logicsrc = zip_source_buffer(archive, buf, length, FALSE);
	286	chunkname = g_strdup_printf("logic-1-%u", next_chunk_num);
	287	i = zip_add(archive, chunkname, logicsrc);
	288	g_free(chunkname);
	289	if (i < 0) {
	290	sr_err("Failed to add chunk 'logic-1-%u': %s",
	291	next_chunk_num, zip_strerror(archive));
	292	zip_source_free(logicsrc);
	293	zip_discard(archive);
	294	g_free(metabuf);
	295	return SR_ERR;
	296	}
	297	if (zip_close(archive) < 0) {
	298	sr_err("Error saving session file: %s", zip_strerror(archive));
	299	zip_discard(archive);
	300	g_free(metabuf);
	301	return SR_ERR;
	302	}
	303	g_free(metabuf);
	304
	305	return SR_OK;
	306	}
	307
	308	static int zip_append_analog(const struct sr_output *o,
	309	const struct sr_datafeed_analog *analog)
	310	{
	311	struct out_context *outc;
	312	struct zip *archive;
	313	struct zip_source *analogsrc;
	314	int64_t i, num_files;
	315	struct zip_stat zs;
	316	uint64_t chunk_num;
	317	const char *entry_name;
	318	char *basename;
	319	gsize baselen;
	320	struct sr_channel *channel;
	321	float *chunkbuf;
	322	gsize chunksize;
	323	char *chunkname;
	324	unsigned int next_chunk_num, index;
	325
	326	outc = o->priv;
	327
	328	/* TODO: support packets covering multiple channels */
	329	if (g_slist_length(analog->meaning->channels) != 1) {
	330	sr_err("Analog packets covering multiple channels not supported yet");
	331	return SR_ERR;
	332	}
	333	channel = analog->meaning->channels->data;
	334
	335	/* When reading the file, analog channels must be consecutive.
	336	* Thus we need a global channel index map as we don't know in
	337	* which order the channel data comes in. */
	338	for (index = 0; outc->analog_index_map[index] != -1; index++)
	339	if (outc->analog_index_map[index] == channel->index)
	340	break;
	341	if (outc->analog_index_map[index] == -1)
	342	return SR_ERR_ARG; /* Channel index was not in the list */
	343
	344	index += outc->first_analog_index;
	345
	346	if (!(archive = zip_open(outc->filename, 0, NULL)))
	347	return SR_ERR;
	348
	349	if (zip_stat(archive, "metadata", 0, &zs) < 0) {
	350	sr_err("Failed to open metadata: %s", zip_strerror(archive));
	351	goto err_zip_discard;
	352	}
	353
	354	basename = g_strdup_printf("analog-1-%u", index);
	355	baselen = strlen(basename);
	356	next_chunk_num = 1;
	357	num_files = zip_get_num_entries(archive, 0);
	358	for (i = 0; i < num_files; i++) {
	359	entry_name = zip_get_name(archive, i, 0);
	360	if (!entry_name \|\| strncmp(entry_name, basename, baselen) != 0) {
	361	continue;
	362	} else if (entry_name[baselen] == '-') {
	363	chunk_num = g_ascii_strtoull(entry_name + baselen + 1, NULL, 10);
	364	if (chunk_num < G_MAXINT && chunk_num >= next_chunk_num)
	365	next_chunk_num = chunk_num + 1;
	366	}
	367	}
	368
	369	chunksize = sizeof(float) * analog->num_samples;
	370	if (!(chunkbuf = g_try_malloc(chunksize)))
	371	goto err_free_basename;
	372
	373	if (sr_analog_to_float(analog, chunkbuf) != SR_OK)
	374	goto err_free_chunkbuf;
	375
	376	analogsrc = zip_source_buffer(archive, chunkbuf, chunksize, FALSE);
	377	chunkname = g_strdup_printf("%s-%u", basename, next_chunk_num);
	378	i = zip_add(archive, chunkname, analogsrc);
	379	g_free(chunkname);
	380	if (i < 0) {
	381	sr_err("Failed to add chunk '%s': %s", chunkname, zip_strerror(archive));
	382	zip_source_free(analogsrc);
	383	goto err_free_chunkbuf;
	384	}
	385	if (zip_close(archive) < 0) {
	386	sr_err("Error saving session file: %s", zip_strerror(archive));
	387	goto err_free_chunkbuf;
	388	}
	389
	390	g_free(basename);
	391	g_free(chunkbuf);
	392
	393	return SR_OK;
	394
	395	err_free_chunkbuf:
	396	g_free(chunkbuf);
	397	err_free_basename:
	398	g_free(basename);
	399	err_zip_discard:
	400	zip_discard(archive);
	401
	402	return SR_ERR;
	403	}
	404
	405	static int receive(const struct sr_output o, const struct sr_datafeed_packet packet,
	406	GString **out)
	407	{
	408	struct out_context *outc;
	409	const struct sr_datafeed_meta *meta;
	410	const struct sr_datafeed_logic *logic;
	411	const struct sr_datafeed_analog *analog;
	412	const struct sr_config *src;
	413	GSList *l;
	414
	415	int ret;
	416
	417	*out = NULL;
	418	if (!o \|\| !o->sdi \|\| !(outc = o->priv))
	419	return SR_ERR_ARG;
	420
	421	switch (packet->type) {
	422	case SR_DF_META:
	423	meta = packet->payload;
	424	for (l = meta->config; l; l = l->next) {
	425	src = l->data;
	426	if (src->key != SR_CONF_SAMPLERATE)
	427	continue;
	428	outc->samplerate = g_variant_get_uint64(src->data);
	429	}
	430	break;
	431	case SR_DF_LOGIC:
	432	if (!outc->zip_created) {
	433	if ((ret = zip_create(o)) != SR_OK)
	434	return ret;
	435	outc->zip_created = TRUE;
	436	}
	437	logic = packet->payload;
	438	ret = zip_append(o, logic->data, logic->unitsize, logic->length);
	439	if (ret != SR_OK)
	440	return ret;
	441	break;
	442	case SR_DF_ANALOG:
	443	if (!outc->zip_created) {
	444	if ((ret = zip_create(o)) != SR_OK)
	445	return ret;
	446	outc->zip_created = TRUE;
	447	}
	448	analog = packet->payload;
	449	ret = zip_append_analog(o, analog);
	450	if (ret != SR_OK)
	451	return ret;
	452	break;
	453	}
	454
	455	return SR_OK;
	456	}
	457
	458	static struct sr_option options[] = {
	459	ALL_ZERO
	460	};
	461
	462	static const struct sr_option *get_options(void)
	463	{
	464	if (!options[0].def)
	465	options[0].def = g_variant_ref_sink(g_variant_new_string(""));
	466
	467	return options;
	468	}
	469
	470	static int cleanup(struct sr_output *o)
	471	{
	472	struct out_context *outc;
	473
	474	outc = o->priv;
	475	g_variant_unref(options[0].def);
	476	g_free(outc->analog_index_map);
	477	g_free(outc->filename);
	478	g_free(outc);
	479	o->priv = NULL;
	480
	481	return SR_OK;
	482	}
	483
	484	SR_PRIV struct sr_output_module output_srzip = {
	485	.id = "srzip",
	486	.name = "srzip",
	487	.desc = "srzip session file",
	488	.exts = (const char*[]){"sr", NULL},
	489	.flags = SR_OUTPUT_INTERNAL_IO_HANDLING,
	490	.options = get_options,
	491	.init = init,
	492	.receive = receive,
	493	.cleanup = cleanup,
	494	};