diff options
Diffstat (limited to 'src/fl2k_file.c')
| -rw-r--r-- | src/fl2k_file.c | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/src/fl2k_file.c b/src/fl2k_file.c new file mode 100644 index 0000000..363adc2 --- /dev/null +++ b/src/fl2k_file.c @@ -0,0 +1,207 @@ +/* + * 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; + data_info->g_buf = txbuf; + data_info->b_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); + + file = fopen(filename, "rb"); + if (!file) { + fprintf(stderr, "Failed to open %s\n", filename); + goto out; + } + + 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; +} |