fmlib.h

   1 /* fmlib.c - simple V4L2 compatible tuner for radio cards
   2
   3    Copyright (C) 2009 Ben Pfaff <blp@cs.stanford.edu>
   4
   5    This program is free software; you can redistribute it and/or modify it
   6    under the terms of the GNU General Public License as published by the Free
   7    Software Foundation; either version 2 of the License, or (at your option)
   8    any later version.
   9
  10    This program is distributed in the hope that it will be useful, but WITHOUT
  11    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13    more details.
  14
  15    You should have received a copy of the GNU General Public License along with
  16    this program.  If not, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19 #ifndef FMLIB_H
  20 #define FMLIB_H 1
  21
  22 #include <linux/videodev2.h>
  23 #include <stdint.h>
  24 #include <stdbool.h>
  25
  26 struct tuner {
  27         int fd;
  28         int index;
  29         struct v4l2_queryctrl volume_ctrl;
  30         struct v4l2_tuner tuner;
  31         struct tuner_test *test;
  32 };
  33
  34 extern char *program_name;
  35
  36 void fatal(int error, const char *msg, ...)
  37         __attribute__((noreturn, format(printf, 2, 3)));
  38
  39 void tuner_open(struct tuner *, const char *device, int index);
  40 void tuner_close(struct tuner *);
  41
  42 bool tuner_is_muted(const struct tuner *);
  43 void tuner_set_mute(struct tuner *, bool mute);
  44
  45 bool tuner_has_volume_control(const struct tuner *);
  46 double tuner_get_volume(const struct tuner *);
  47 void tuner_set_volume(struct tuner *, double volume);
  48
  49 long long int tuner_get_min_freq(const struct tuner *);
  50 long long int tuner_get_max_freq(const struct tuner *);
  51 void tuner_set_freq(const struct tuner *, long long int frequency,
  52                     bool override_range);
  53
  54 int tuner_get_signal(const struct tuner *);
  55 void tuner_sleep(const struct tuner *, int secs);
  56 void tuner_usleep(const struct tuner *, int usecs);
  57
  58 #endif /* fmlib.h */