sound-ioctl.c

   1 /* Easier writing these bits in C rather
   2    than defining the ioctls in D */
   3
   4 #include "fcntl.h"
   5 #include "sys/ioctl.h"
   6 #include "linux/soundcard.h"
   7
   8 int sound_set_format(int fd, int format)
   9 {
  10     int tmp;
  11     tmp = format;
  12     if (ioctl(fd, SNDCTL_DSP_SETFMT, &tmp) == -1
  13       || tmp != format)
  14     {
  15         return -1;
  16     } else {
  17         return 0;
  18     }
  19 }
  20
  21 int sound_set_srate(int fd, int srate)
  22 {
  23     int tmp;
  24     tmp = srate;
  25     if (ioctl(fd, SNDCTL_DSP_SPEED, &tmp) == -1
  26       || tmp != srate)
  27     {
  28         return -1;
  29     } else {
  30         return 0;
  31     }
  32 }
  33
  34 int sound_set_channels(int fd, int channels)
  35 {
  36     int tmp;
  37     tmp = channels;
  38     if (ioctl(fd, SNDCTL_DSP_CHANNELS, &tmp) == -1
  39       || tmp != channels)
  40     {
  41         return -1;
  42     } else {
  43         return 0;
  44     }
  45 }
  46