96 lines
2.3 KiB
C
96 lines
2.3 KiB
C
/*
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* Copyright (C) 12 Jun 2003 Tomas Cermak
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*
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* This file is part of wmradio program.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/time.h>
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#include <sys/ioctl.h>
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#include <linux/videodev.h>
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char *device = "/dev/radio";
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int get_freq_fact(int fd)
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{
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struct video_tuner tuner;
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tuner.tuner = 0;
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if (ioctl (fd, VIDIOCGTUNER, &tuner) < 0)
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return 16;
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if ((tuner.flags & VIDEO_TUNER_LOW) == 0)
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return 16;
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return 16000;
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}
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int radio_setfreq(int fd, int freq)
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{
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int ifreq = (freq/100.0+1.0/32.0)*get_freq_fact(fd);
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return ioctl(fd, VIDIOCSFREQ, &ifreq);
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}
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void radio_unmute(int fd)
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{
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struct video_audio vid_aud;
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if (ioctl(fd, VIDIOCGAUDIO, &vid_aud))
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perror("VIDIOCGAUDIO");
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if (vid_aud.volume == 0)
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vid_aud.volume = 65535;
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vid_aud.flags &= ~VIDEO_AUDIO_MUTE;
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if (ioctl(fd, VIDIOCSAUDIO, &vid_aud))
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perror("VIDIOCSAUDIO");
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}
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void radio_mute(int fd)
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{
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struct video_audio vid_aud;
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if (ioctl(fd, VIDIOCGAUDIO, &vid_aud))
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perror("VIDIOCGAUDIO");
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vid_aud.flags |= VIDEO_AUDIO_MUTE;
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if (ioctl(fd, VIDIOCSAUDIO, &vid_aud))
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perror("VIDIOCSAUDIO");
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}
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int radio_getstereo(int fd)
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{
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struct video_audio va;
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va.mode=-1;
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if(ioctl(fd, VIDIOCGAUDIO, &va) < 0) return 0;
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return va.mode == VIDEO_SOUND_STEREO ? 1 : 0;
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}
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int radio_getsignal(int fd)
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{
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struct video_tuner vt;
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int signal;
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memset(&vt,0,sizeof(vt));
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ioctl (fd, VIDIOCGTUNER, &vt);
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signal=vt.signal>>13;
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return signal;
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};
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