libsigrok/input/input_binary.c

106 lines
2.6 KiB
C

/*
* 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 <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/time.h>
#include <sigrok.h>
#define CHUNKSIZE 4096
#define DEFAULT_NUM_PROBES 8
static int format_match(const char *filename)
{
/* suppress compiler warning */
(void)filename;
/* this module will handle anything you throw at it */
return TRUE;
}
static int init(struct sr_input *in)
{
int num_probes;
if (in->param && in->param[0]) {
num_probes = strtoul(in->param, NULL, 10);
if (num_probes < 1)
return SR_ERR;
} else
num_probes = DEFAULT_NUM_PROBES;
/* create a virtual device */
in->vdevice = sr_device_new(NULL, 0, num_probes);
return SR_OK;
}
static int loadfile(struct sr_input *in, const char *filename)
{
struct sr_datafeed_header header;
struct sr_datafeed_packet packet;
struct sr_datafeed_logic logic;
unsigned char buffer[CHUNKSIZE];
int fd, size, num_probes;
if ((fd = open(filename, O_RDONLY)) == -1)
return SR_ERR;
num_probes = g_slist_length(in->vdevice->probes);
/* send header */
header.feed_version = 1;
header.num_logic_probes = num_probes;
header.num_analog_probes = 0;
header.samplerate = 0;
gettimeofday(&header.starttime, NULL);
packet.type = SR_DF_HEADER;
packet.payload = &header;
sr_session_bus(in->vdevice, &packet);
/* chop up the input file into chunks and feed it into the session bus */
packet.type = SR_DF_LOGIC;
packet.payload = &logic;
logic.unitsize = (num_probes + 7) / 8;
logic.data = buffer;
while ((size = read(fd, buffer, CHUNKSIZE)) > 0) {
logic.length = size;
sr_session_bus(in->vdevice, &packet);
}
close(fd);
/* end of stream */
packet.type = SR_DF_END;
sr_session_bus(in->vdevice, &packet);
return SR_OK;
}
struct sr_input_format input_binary = {
.id = "binary",
.description = "Raw binary",
.format_match = format_match,
.init = init,
.loadfile = loadfile,
};