libsigrok/session.c

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/*
* This file is part of the sigrok project.
*
* Copyright (C) 2010 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 <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <zip.h>
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#include <sigrok.h>
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/* There can only be one session at a time. */
struct session *session;
struct session *session_load(const char *filename)
{
struct session *session;
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/* TODO: Implement. */
session = NULL;
/* QUICK HACK */
filename = filename;
return session;
}
struct session *session_new(void)
{
session = calloc(1, sizeof(struct session));
return session;
}
void session_destroy(void)
{
g_slist_free(session->devices);
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/* TODO: Loop over protocols and free them. */
g_free(session);
}
void session_device_clear(void)
{
g_slist_free(session->devices);
session->devices = NULL;
}
int session_device_add(struct device *device)
{
int ret;
ret = device->plugin->open(device->plugin_index);
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if (ret == SIGROK_OK)
session->devices = g_slist_append(session->devices, device);
return ret;
}
void session_pa_clear(void)
{
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/*
* The protocols are pointers to the global set of PA plugins,
* so don't free them.
*/
g_slist_free(session->analyzers);
session->analyzers = NULL;
}
void session_pa_add(struct analyzer *an)
{
session->analyzers = g_slist_append(session->analyzers, an);
}
void session_datafeed_callback_clear(void)
{
g_slist_free(session->datafeed_callbacks);
session->datafeed_callbacks = NULL;
}
void session_datafeed_callback_add(datafeed_callback callback)
{
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session->datafeed_callbacks =
g_slist_append(session->datafeed_callbacks, callback);
}
int session_start(void)
{
struct device *device;
GSList *l;
int ret;
g_message("starting acquisition");
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for (l = session->devices; l; l = l->next) {
device = l->data;
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if ((ret = device->plugin->start_acquisition(
device->plugin_index, device)) != SIGROK_OK)
break;
}
return ret;
}
void session_stop(void)
{
struct device *device;
GSList *l;
g_message("stopping acquisition");
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for (l = session->devices; l; l = l->next) {
device = l->data;
device->plugin->stop_acquisition(device->plugin_index, device);
}
}
void session_bus(struct device *device, struct datafeed_packet *packet)
{
GSList *l;
datafeed_callback cb;
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/*
* TODO: Send packet through PA pipe, and send the output of that to
* the callbacks as well.
*/
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for (l = session->datafeed_callbacks; l; l = l->next) {
cb = l->data;
cb(device, packet);
}
}
void make_metadata(char *filename)
{
GSList *l, *p;
struct device *device;
struct probe *probe;
FILE *f;
int devcnt;
f = fopen(filename, "wb");
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/* General */
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/* Devices */
devcnt = 1;
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for (l = session->devices; l; l = l->next) {
device = l->data;
fprintf(f, "[device]\n");
fprintf(f, "driver = %s\n", device->plugin->name);
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if (device->datastore)
fprintf(f, "capturefile = raw-%d\n", devcnt);
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for (p = device->probes; p; p = p->next) {
probe = p->data;
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if (probe->enabled) {
fprintf(f, "probe %d", probe->index);
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if (probe->name)
fprintf(f, " name \"%s\"", probe->name);
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if (probe->trigger)
fprintf(f, " trigger \"%s\"",
probe->trigger);
fprintf(f, "\n");
}
}
devcnt++;
}
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/* TODO: Protocol analyzers */
fclose(f);
}
int session_save(char *filename)
{
GSList *l, *d;
struct device *device;
struct datastore *ds;
struct zip *zipfile;
struct zip_source *src;
int bufcnt, devcnt, tmpfile, ret, error;
char version[1], rawname[16], metafile[32], *buf;
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/* Quietly delete it first, libzip wants replace ops otherwise. */
unlink(filename);
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if (!(zipfile = zip_open(filename, ZIP_CREATE, &error)))
return SIGROK_ERR;
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/* Version */
version[0] = '1';
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if (!(src = zip_source_buffer(zipfile, version, 1, 0)))
return SIGROK_ERR;
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if (zip_add(zipfile, "version", src) == -1) {
g_message("error saving version into zipfile: %s",
zip_strerror(zipfile));
return SIGROK_ERR;
}
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/* Metadata */
strcpy(metafile, "sigrok-meta-XXXXXX");
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if ((tmpfile = g_mkstemp(metafile)) == -1)
return SIGROK_ERR;
close(tmpfile);
make_metadata(metafile);
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if (!(src = zip_source_file(zipfile, metafile, 0, -1)))
return SIGROK_ERR;
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if (zip_add(zipfile, "metadata", src) == -1)
return SIGROK_ERR;
unlink(metafile);
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/* Raw */
devcnt = 1;
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for (l = session->devices; l; l = l->next) {
device = l->data;
ds = device->datastore;
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if (ds) {
buf = malloc(ds->num_units * ds->ds_unitsize +
DATASTORE_CHUNKSIZE);
bufcnt = 0;
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for (d = ds->chunklist; d; d = d->next) {
memcpy(buf + bufcnt, d->data,
DATASTORE_CHUNKSIZE);
bufcnt += DATASTORE_CHUNKSIZE;
}
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if (!(src = zip_source_buffer(zipfile, buf,
ds->num_units * ds->ds_unitsize, TRUE)))
return SIGROK_ERR;
snprintf(rawname, 15, "raw-%d", devcnt);
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if (zip_add(zipfile, rawname, src) == -1)
return SIGROK_ERR;
}
devcnt++;
}
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if ((ret = zip_close(zipfile)) == -1) {
g_message("error saving zipfile: %s", zip_strerror(zipfile));
return SIGROK_ERR;
}
return SIGROK_OK;
}