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 "linux/soundcard.h"
   6
   7 int sound_set_format(int fd, int format)
   8 {
   9     int tmp;
  10     tmp = format;
  11     if (ioctl(fd, SNDCTL_DSP_SETFMT, &tmp) == -1
  12       || tmp != format)
  13     {
  14         return -1;
  15     } else {
  16         return 0;
  17     }
  18 }
  19
  20 int sound_set_srate(int fd, int srate)
  21 {
  22     int tmp;
  23     tmp = srate;
  24     if (ioctl(fd, SNDCTL_DSP_SPEED, &tmp) == -1
  25       || tmp != srate)
  26     {
  27         return -1;
  28     } else {
  29         return 0;
  30     }
  31 }
  32
  33 int sound_set_channels(int fd, int channels)
  34 {
  35     int tmp;
  36     tmp = channels;
  37     if (ioctl(fd, SNDCTL_DSP_CHANNELS, &tmp) == -1
  38       || tmp != channels)
  39     {
  40         return -1;
  41     } else {
  42         return 0;
  43     }
  44 }
  45