152 lines
4 KiB
C
152 lines
4 KiB
C
#include <stdio.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <unistd.h>
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#include <string.h>
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#include <time.h>
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#include <linux/videodev2.h>
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#include <sqlite3.h>
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#include "rds.h"
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#include "tmc.h"
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sqlite3 *lcl_db;
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int OutputFlags;
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unsigned char pi_received = 0;
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unsigned char sid_received = 0;
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void test_rds_PI_cb(unsigned short PI, unsigned char ccode, unsigned char ptype, unsigned char pref, void *udata)
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{
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printf("New PI=%d ccode=%X ptype=%X '%s' '%s' pref=%d\n", PI, ccode, ptype, ptype_stext[ptype], ptype_ltext[ptype], pref);
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pi_received = 1;
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}
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void test_rds_sname_cb(char *sname, void *udata)
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{
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printf("RDS sname='%s'\n", sname);
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sid_received = 1;
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}
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void station_scan(int fd)
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{
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int ret;
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struct v4l2_frequency v4lfreq;
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struct v4l2_tuner v4ltuner;
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unsigned short rdsgroup[4];
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v4ltuner.index = 0;
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ret = ioctl(fd, VIDIOC_G_TUNER, &v4ltuner);
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if (ret < 0)
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return;
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printf("tuner=%d\n", v4ltuner.index);
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if (v4ltuner.type == V4L2_TUNER_RADIO)
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printf(" is a radio tuner\n");
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printf("name='%s'\n", v4ltuner.name);
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v4lfreq.tuner = v4ltuner.index;
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memset(&v4lfreq.reserved, 0, 32);
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ret = ioctl(fd, VIDIOC_G_FREQUENCY, &v4lfreq);
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if (ret < 0)
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return;
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v4lfreq.frequency = v4ltuner.rangelow;
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while (v4lfreq.frequency <= v4ltuner.rangehigh) {
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ret = ioctl(fd, VIDIOC_S_FREQUENCY, &v4lfreq);
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if (ret < 0)
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break;
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ret = ioctl(fd, VIDIOC_G_FREQUENCY, &v4lfreq);
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if (ret < 0)
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break;
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ret = ioctl(fd, VIDIOC_G_TUNER, &v4ltuner);
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if (ret < 0)
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break;
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printf("%lf %d %d %s %s\n", (double)v4lfreq.frequency * 62.5 / 1000000,
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v4lfreq.frequency,
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v4ltuner.signal,
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v4ltuner.rxsubchans & V4L2_TUNER_SUB_STEREO ? "stereo" : "mono",
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v4ltuner.rxsubchans & V4L2_TUNER_SUB_RDS ? "RDS" : "noRDS");
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if (v4ltuner.signal > 30000) {
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/* seems to be a strong signal, so try RDS */
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pi_received = 0;
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sid_received = 0;
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rds_radio_retuned();
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while (pi_received == 0 || sid_received == 0) {
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if (rds_receive_group(fd, rdsgroup)) {
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/* group complete, start decode */
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rds_decode_group(rdsgroup);
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}
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}
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}
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v4lfreq.frequency += 1600; /* 1600 for .1MHz steps, 800 for 0.05MHz */
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}
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}
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int main(int argc, char **argv)
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{
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int fd, ret;
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struct v4l2_capability v4lcap;
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struct v4l2_frequency v4lfreq;
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struct v4l2_tuner v4ltuner;
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fd = open ("/dev/radio0", O_RDONLY);
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if (fd < 0) {
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printf("error opening fd\n");
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perror("open");
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return 1;
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}
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ret = ioctl(fd, VIDIOC_QUERYCAP, &v4lcap);
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if (ret < 0)
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return 1;
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printf("driver = '%s'\n", v4lcap.driver);
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printf("card = '%s'\n", v4lcap.card);
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printf("bus_info = '%s'\n", v4lcap.bus_info);
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printf("cap && RADIO = %s\n", (v4lcap.capabilities & V4L2_CAP_RADIO) ? "yes" : "no");
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printf("cap && TUNER = %s\n", (v4lcap.capabilities & V4L2_CAP_TUNER) ? "yes" : "no");
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printf("cap && RDS = %s\n", (v4lcap.capabilities & V4L2_CAP_RDS_CAPTURE) ? "yes" : "no");
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v4ltuner.index = 0;
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ret = ioctl(fd, VIDIOC_G_TUNER, &v4ltuner);
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if (ret < 0)
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return 1;
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printf("tuner=%d\n", v4ltuner.index);
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if (v4ltuner.type == V4L2_TUNER_RADIO)
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printf(" is a radio tuner\n");
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printf("name='%s'\n", v4ltuner.name);
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v4lfreq.tuner = v4ltuner.index;
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memset(&v4lfreq.reserved, 0, 32);
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ret = ioctl(fd, VIDIOC_G_FREQUENCY, &v4lfreq);
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if (ret >= 0) {
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if (v4ltuner.capability & V4L2_TUNER_CAP_LOW) {
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printf("range %3.2lf MHz - %3.2lf MHz\n", (double)v4ltuner.rangelow * 62.5 / 1000000, (double)v4ltuner.rangehigh * 62.5 / 1000000);
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printf("freq = %3.2lf MHz\n", (double)v4lfreq.frequency * 62.5 / 1000000);
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} else
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printf("freq = %lf kHz\n", (double)v4lfreq.frequency * 62.5);
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}
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printf("signal: %d %s\n", v4ltuner.signal, v4ltuner.rxsubchans & V4L2_TUNER_SUB_STEREO ? "stereo" : "mono");
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printf("RDS signal present: %s\n", v4ltuner.rxsubchans & V4L2_TUNER_SUB_RDS ? "yes" : "no");
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if (argc > 1 && strcmp(argv[1], "-s")==0) {
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rds_init();
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tmc_init();
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rds_set_sname_cb(test_rds_sname_cb, NULL);
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rds_set_PI_cb(test_rds_PI_cb, NULL);
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station_scan(fd);
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}
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close(fd);
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return 0;
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}
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