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/*
* osmo-fl2k, turns FL2000-based USB 3.0 to VGA adapters into
* low cost DACs
*
* Copyright (C) 2016-2018 by Steve Markgraf <steve@steve-m.de>
*
* SPDX-License-Identifier: GPL-2.0+
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <errno.h>
#include <signal.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#ifndef _WIN32
#include <unistd.h>
#else
#include <windows.h>
#include <io.h>
#include <fcntl.h>
#include "getopt/getopt.h"
#endif
#include "osmo-fl2k.h"
static fl2k_dev_t *dev = NULL;
static volatile int do_exit = 0;
static volatile int repeat = 1;
FILE *file;
char *txbuf = NULL;
void usage(void)
{
fprintf(stderr,
"fl2k_file, a sample player for FL2K VGA dongles\n\n"
"Usage:\n"
"\t[-d device_index (default: 0)]\n"
"\t[-r repeat file (default: 1)]\n"
"\t[-s samplerate (default: 100 MS/s)]\n"
"\tfilename (use '-' to read from stdin)\n\n"
);
exit(1);
}
#ifdef _WIN32
BOOL WINAPI
sighandler(int signum)
{
if (CTRL_C_EVENT == signum) {
fprintf(stderr, "Signal caught, exiting!\n");
fl2k_stop_tx(dev);
do_exit = 1;
return TRUE;
}
return FALSE;
}
#else
static void sighandler(int signum)
{
fprintf(stderr, "Signal caught, exiting!\n");
fl2k_stop_tx(dev);
do_exit = 1;
}
#endif
void fl2k_callback(fl2k_data_info_t *data_info)
{
int r, left = FL2K_BUF_LEN;
static uint32_t repeat_cnt = 0;
data_info->sampletype_signed = 1;
data_info->r_buf = txbuf;
while (!do_exit && (left > 0)) {
r = fread(txbuf + (FL2K_BUF_LEN - left), 1, left, file);
if (ferror(file))
fprintf(stderr, "File Error\n");
if (feof(file)) {
if (repeat) {
repeat_cnt++;
fprintf(stderr, "repeat %d\n", repeat_cnt);
rewind(file);
} else {
fl2k_stop_tx(dev);
do_exit = 1;
}
}
if (r > 0)
left -= r;
}
}
int main(int argc, char **argv)
{
#ifndef _WIN32
struct sigaction sigact, sigign;
#endif
int r, opt, i;
uint32_t samp_rate = 100000000;
uint32_t buf_num = 0;
int dev_index = 0;
void *status;
char *filename = NULL;
while ((opt = getopt(argc, argv, "d:r:s:")) != -1) {
switch (opt) {
case 'd':
dev_index = (uint32_t)atoi(optarg);
break;
case 'r':
repeat = (int)atoi(optarg);
break;
case 's':
samp_rate = (uint32_t)atof(optarg);
break;
default:
usage();
break;
}
}
if (argc <= optind)
usage();
else
filename = argv[optind];
if (dev_index < 0)
exit(1);
if (strcmp(filename, "-") == 0) { /* Read samples from stdin */
file = stdin;
#ifdef _WIN32
_setmode(_fileno(stdin), _O_BINARY);
#endif
} else {
file = fopen(filename, "rb");
if (!file) {
fprintf(stderr, "Failed to open %s\n", filename);
return -ENOENT;
}
}
txbuf = malloc(FL2K_BUF_LEN);
if (!txbuf) {
fprintf(stderr, "malloc error!\n");
goto out;
}
fl2k_open(&dev, (uint32_t)dev_index);
if (NULL == dev) {
fprintf(stderr, "Failed to open fl2k device #%d.\n", dev_index);
goto out;
}
r = fl2k_start_tx(dev, fl2k_callback, NULL, 0);
/* Set the sample rate */
r = fl2k_set_sample_rate(dev, samp_rate);
if (r < 0)
fprintf(stderr, "WARNING: Failed to set sample rate.\n");
#ifndef _WIN32
sigact.sa_handler = sighandler;
sigemptyset(&sigact.sa_mask);
sigact.sa_flags = 0;
sigign.sa_handler = SIG_IGN;
sigaction(SIGINT, &sigact, NULL);
sigaction(SIGTERM, &sigact, NULL);
sigaction(SIGQUIT, &sigact, NULL);
sigaction(SIGPIPE, &sigign, NULL);
#else
SetConsoleCtrlHandler( (PHANDLER_ROUTINE) sighandler, TRUE );
#endif
while (!do_exit) {
#ifndef _WIN32
usleep(500000);
#else
Sleep(0.5);
#endif
}
fl2k_close(dev);
out:
if (txbuf)
free(txbuf);
if (file && (file != stdin))
fclose(file);
return 0;
}
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