libsigrok/output/float.c

150 lines
3.2 KiB
C

/*
* This file is part of the sigrok project.
*
* Copyright (C) 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 <stdlib.h>
#include <string.h>
#include <glib.h>
#include "config.h"
#include "libsigrok.h"
#include "libsigrok-internal.h"
struct context {
unsigned int num_enabled_probes;
GPtrArray *probelist;
};
static int init(struct sr_output *o)
{
struct context *ctx;
struct sr_probe *probe;
GSList *l;
if (!o)
return SR_ERR_ARG;
if (!o->sdi)
return SR_ERR_ARG;
if (!o->sdi->driver)
return SR_ERR_ARG;
if (!(ctx = g_try_malloc0(sizeof(struct context))))
return SR_ERR_MALLOC;
o->internal = ctx;
/* Get the number of probes and their names. */
ctx->probelist = g_ptr_array_new();
for (l = o->sdi->probes; l; l = l->next) {
probe = l->data;
if (!probe || !probe->enabled)
continue;
g_ptr_array_add(ctx->probelist, probe->name);
ctx->num_enabled_probes++;
}
return SR_OK;
}
static int event(struct sr_output *o, int event_type, uint8_t **data_out,
uint64_t *length_out)
{
struct context *ctx;
if (!o)
return SR_ERR_ARG;
if (!(ctx = o->internal))
return SR_ERR_ARG;
if (!data_out)
return SR_ERR_ARG;
switch (event_type) {
case SR_DF_FRAME_BEGIN:
*data_out = (uint8_t *)g_strdup("FRAME-BEGIN\n");
*length_out = 12;
break;
case SR_DF_FRAME_END:
*data_out = (uint8_t *)g_strdup("FRAME-END\n");
*length_out = 10;
break;
case SR_DF_END:
*data_out = NULL;
*length_out = 0;
g_ptr_array_free(ctx->probelist, TRUE);
g_free(o->internal);
o->internal = NULL;
break;
default:
/* Ignore everything else. */
*data_out = NULL;
*length_out = 0;
break;
}
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)
{
struct context *ctx;
GString *outstr;
float *fdata;
uint64_t max, i;
unsigned int j;
if (!o)
return SR_ERR_ARG;
if (!(ctx = o->internal))
return SR_ERR_ARG;
if (!data_in || !data_out)
return SR_ERR_ARG;
outstr = g_string_sized_new(512);
fdata = (float *)data_in;
max = length_in / sizeof(float);
for (i = 0; i < max;) {
for (j = 0; j < ctx->num_enabled_probes; j++) {
g_string_append_printf(outstr, "%s: %f\n",
(char *)g_ptr_array_index(ctx->probelist, j),
fdata[i++]);
}
}
*data_out = (uint8_t *)outstr->str;
*length_out = outstr->len;
g_string_free(outstr, FALSE);
return SR_OK;
}
SR_PRIV struct sr_output_format output_float = {
.id = "float",
.description = "Floating point",
.df_type = SR_DF_ANALOG,
.init = init,
.data = data,
.event = event,
};