libsigrok/output/ols.c

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/*
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* This file is part of the libsigrok project.
*
* Copyright (C) 2011 Uwe Hermann <uwe@hermann-uwe.de>
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* 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 2 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* This implements version 1.3 of the output format for the OpenBench Logic
* Sniffer "Alternative" Java client. Details:
* https://github.com/jawi/ols/wiki/OLS-data-file-format
*/
#include <stdlib.h>
#include <string.h>
#include <glib.h>
#include "libsigrok.h"
#include "libsigrok-internal.h"
/* Message logging helpers with driver-specific prefix string. */
#define DRIVER_LOG_DOMAIN "output/ols: "
#define sr_log(l, s, args...) sr_log(l, DRIVER_LOG_DOMAIN s, ## args)
#define sr_spew(s, args...) sr_spew(DRIVER_LOG_DOMAIN s, ## args)
#define sr_dbg(s, args...) sr_dbg(DRIVER_LOG_DOMAIN s, ## args)
#define sr_info(s, args...) sr_info(DRIVER_LOG_DOMAIN s, ## args)
#define sr_warn(s, args...) sr_warn(DRIVER_LOG_DOMAIN s, ## args)
#define sr_err(s, args...) sr_err(DRIVER_LOG_DOMAIN s, ## args)
struct context {
GString *header;
uint64_t num_samples;
unsigned int unitsize;
};
static int init(struct sr_output *o)
{
struct context *ctx;
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struct sr_probe *probe;
GSList *l;
GVariant *gvar;
uint64_t samplerate;
int num_enabled_probes;
if (!(ctx = g_try_malloc(sizeof(struct context)))) {
sr_err("%s: ctx malloc failed", __func__);
return SR_ERR_MALLOC;
}
o->internal = ctx;
ctx->num_samples = 0;
num_enabled_probes = 0;
for (l = o->sdi->probes; l; l = l->next) {
probe = l->data;
if (probe->enabled)
num_enabled_probes++;
}
ctx->unitsize = (num_enabled_probes + 7) / 8;
if (o->sdi->driver && sr_dev_has_option(o->sdi, SR_CONF_SAMPLERATE)) {
o->sdi->driver->config_get(SR_CONF_SAMPLERATE, &gvar, o->sdi);
samplerate = g_variant_get_uint64(gvar);
g_variant_unref(gvar);
} else {
samplerate = 0;
}
ctx->header = g_string_sized_new(512);
g_string_append_printf(ctx->header, ";Rate: %"PRIu64"\n", samplerate);
g_string_append_printf(ctx->header, ";Channels: %d\n", num_enabled_probes);
g_string_append_printf(ctx->header, ";EnabledChannels: -1\n");
g_string_append_printf(ctx->header, ";Compressed: true\n");
g_string_append_printf(ctx->header, ";CursorEnabled: false\n");
return SR_OK;
}
static int event(struct sr_output *o, int event_type, uint8_t **data_out,
uint64_t *length_out)
{
struct context *ctx;
ctx = o->internal;
if (ctx && event_type == SR_DF_END) {
g_string_free(ctx->header, TRUE);
g_free(o->internal);
o->internal = NULL;
}
*data_out = NULL;
*length_out = 0;
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return SR_OK;
}
static int data(struct sr_output *o, const uint8_t *data_in,
uint64_t length_in, uint8_t **data_out, uint64_t *length_out)
{
GString *out;
struct context *ctx;
uint64_t sample;
unsigned int i;
ctx = o->internal;
if (ctx->header) {
/* first data packet */
out = ctx->header;
ctx->header = NULL;
} else
out = g_string_sized_new(512);
for (i = 0; i <= length_in - ctx->unitsize; i += ctx->unitsize) {
sample = 0;
memcpy(&sample, data_in + i, ctx->unitsize);
g_string_append_printf(out, "%08x@%"PRIu64"\n",
(uint32_t) sample, ctx->num_samples++);
}
*data_out = (uint8_t *)out->str;
*length_out = out->len;
g_string_free(out, FALSE);
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return SR_OK;
}
SR_PRIV struct sr_output_format output_ols = {
.id = "ols",
.description = "OpenBench Logic Sniffer",
.df_type = SR_DF_LOGIC,
.init = init,
.data = data,
.event = event,
};