diff options
Diffstat (limited to 'utils/rtl_sdr.c')
-rw-r--r-- | utils/rtl_sdr.c | 278 |
1 files changed, 0 insertions, 278 deletions
diff --git a/utils/rtl_sdr.c b/utils/rtl_sdr.c deleted file mode 100644 index e6537ca..0000000 --- a/utils/rtl_sdr.c +++ /dev/null @@ -1,278 +0,0 @@ -/* - * rtl-sdr, turns your Realtek RTL2832 based DVB dongle into a SDR receiver - * Copyright (C) 2012 by Steve Markgraf <steve@steve-m.de> - * - * 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 "rtl-sdr.h" -#include "convenience/convenience.h" - -#define DEFAULT_SAMPLE_RATE 2048000 -#define DEFAULT_BUF_LENGTH (16 * 16384) -#define MINIMAL_BUF_LENGTH 512 -#define MAXIMAL_BUF_LENGTH (256 * 16384) - -static int do_exit = 0; -static uint32_t bytes_to_read = 0; -static rtlsdr_dev_t *dev = NULL; - -void usage(void) -{ - fprintf(stderr, - "rtl_sdr, an I/Q recorder for RTL2832 based DVB-T receivers\n\n" - "Usage:\t -f frequency_to_tune_to [Hz]\n" - "\t[-s samplerate (default: 2048000 Hz)]\n" - "\t[-d device_index (default: 0)]\n" - "\t[-g gain (default: 0 for auto)]\n" - "\t[-p ppm_error (default: 0)]\n" - "\t[-b output_block_size (default: 16 * 16384)]\n" - "\t[-n number of samples to read (default: 0, infinite)]\n" - "\t[-S force sync output (default: async)]\n" - "\tfilename (a '-' dumps samples to stdout)\n\n"); - exit(1); -} - -#ifdef _WIN32 -BOOL WINAPI -sighandler(int signum) -{ - if (CTRL_C_EVENT == signum) { - fprintf(stderr, "Signal caught, exiting!\n"); - do_exit = 1; - rtlsdr_cancel_async(dev); - return TRUE; - } - return FALSE; -} -#else -static void sighandler(int signum) -{ - fprintf(stderr, "Signal caught, exiting!\n"); - do_exit = 1; - rtlsdr_cancel_async(dev); -} -#endif - -static void rtlsdr_callback(unsigned char *buf, uint32_t len, void *ctx) -{ - if (ctx) { - if (do_exit) - return; - - if ((bytes_to_read > 0) && (bytes_to_read < len)) { - len = bytes_to_read; - do_exit = 1; - rtlsdr_cancel_async(dev); - } - - if (fwrite(buf, 1, len, (FILE*)ctx) != len) { - fprintf(stderr, "Short write, samples lost, exiting!\n"); - rtlsdr_cancel_async(dev); - } - - if (bytes_to_read > 0) - bytes_to_read -= len; - } -} - -int main(int argc, char **argv) -{ -#ifndef _WIN32 - struct sigaction sigact; -#endif - char *filename = NULL; - int n_read; - int r, opt; - int gain = 0; - int ppm_error = 0; - int sync_mode = 0; - FILE *file; - uint8_t *buffer; - int dev_index = 0; - int dev_given = 0; - uint32_t frequency = 100000000; - uint32_t samp_rate = DEFAULT_SAMPLE_RATE; - uint32_t out_block_size = DEFAULT_BUF_LENGTH; - - while ((opt = getopt(argc, argv, "d:f:g:s:b:n:p:S")) != -1) { - switch (opt) { - case 'd': - dev_index = verbose_device_search(optarg); - dev_given = 1; - break; - case 'f': - frequency = (uint32_t)atofs(optarg); - break; - case 'g': - gain = (int)(atof(optarg) * 10); /* tenths of a dB */ - break; - case 's': - samp_rate = (uint32_t)atofs(optarg); - break; - case 'p': - ppm_error = atoi(optarg); - break; - case 'b': - out_block_size = (uint32_t)atof(optarg); - break; - case 'n': - bytes_to_read = (uint32_t)atof(optarg) * 2; - break; - case 'S': - sync_mode = 1; - break; - default: - usage(); - break; - } - } - - if (argc <= optind) { - usage(); - } else { - filename = argv[optind]; - } - - if(out_block_size < MINIMAL_BUF_LENGTH || - out_block_size > MAXIMAL_BUF_LENGTH ){ - fprintf(stderr, - "Output block size wrong value, falling back to default\n"); - fprintf(stderr, - "Minimal length: %u\n", MINIMAL_BUF_LENGTH); - fprintf(stderr, - "Maximal length: %u\n", MAXIMAL_BUF_LENGTH); - out_block_size = DEFAULT_BUF_LENGTH; - } - - buffer = malloc(out_block_size * sizeof(uint8_t)); - - if (!dev_given) { - dev_index = verbose_device_search("0"); - } - - if (dev_index < 0) { - exit(1); - } - - r = rtlsdr_open(&dev, (uint32_t)dev_index); - if (r < 0) { - fprintf(stderr, "Failed to open rtlsdr device #%d.\n", dev_index); - exit(1); - } -#ifndef _WIN32 - sigact.sa_handler = sighandler; - sigemptyset(&sigact.sa_mask); - sigact.sa_flags = 0; - sigaction(SIGINT, &sigact, NULL); - sigaction(SIGTERM, &sigact, NULL); - sigaction(SIGQUIT, &sigact, NULL); - sigaction(SIGPIPE, &sigact, NULL); -#else - SetConsoleCtrlHandler( (PHANDLER_ROUTINE) sighandler, TRUE ); -#endif - /* Set the sample rate */ - verbose_set_sample_rate(dev, samp_rate); - - /* Set the frequency */ - verbose_set_frequency(dev, frequency); - - if (0 == gain) { - /* Enable automatic gain */ - verbose_auto_gain(dev); - } else { - /* Enable manual gain */ - gain = nearest_gain(dev, gain); - verbose_gain_set(dev, gain); - } - - verbose_ppm_set(dev, ppm_error); - - if(strcmp(filename, "-") == 0) { /* Write samples to stdout */ - file = stdout; -#ifdef _WIN32 - _setmode(_fileno(stdin), _O_BINARY); -#endif - } else { - file = fopen(filename, "wb"); - if (!file) { - fprintf(stderr, "Failed to open %s\n", filename); - goto out; - } - } - - /* Reset endpoint before we start reading from it (mandatory) */ - verbose_reset_buffer(dev); - - if (sync_mode) { - fprintf(stderr, "Reading samples in sync mode...\n"); - while (!do_exit) { - r = rtlsdr_read_sync(dev, buffer, out_block_size, &n_read); - if (r < 0) { - fprintf(stderr, "WARNING: sync read failed.\n"); - break; - } - - if ((bytes_to_read > 0) && (bytes_to_read < (uint32_t)n_read)) { - n_read = bytes_to_read; - do_exit = 1; - } - - if (fwrite(buffer, 1, n_read, file) != (size_t)n_read) { - fprintf(stderr, "Short write, samples lost, exiting!\n"); - break; - } - - if ((uint32_t)n_read < out_block_size) { - fprintf(stderr, "Short read, samples lost, exiting!\n"); - break; - } - - if (bytes_to_read > 0) - bytes_to_read -= n_read; - } - } else { - fprintf(stderr, "Reading samples in async mode...\n"); - r = rtlsdr_read_async(dev, rtlsdr_callback, (void *)file, - 0, out_block_size); - } - - if (do_exit) - fprintf(stderr, "\nUser cancel, exiting...\n"); - else - fprintf(stderr, "\nLibrary error %d, exiting...\n", r); - - if (file != stdout) - fclose(file); - - rtlsdr_close(dev); - free (buffer); -out: - return r >= 0 ? r : -r; -} |