[patch] little-endian dmasound silently fails

[Brad Midgley]

> How does it write "little-endian data"?  Does the program take care of CPU
> being big-endian in some way?  If not, I'd think it's the program's fault.

the api provides for a way for clients to set the driver to accept
little-endian data. worse than simply not implementing it, dmasound also
makes it *appear* that it implements it.

#include <stdio.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <linux/soundcard.h>

void die(char *m) {
  printf("%s\n", m);
  exit(1);
}

int main(int argc, char *argv[]) {
  int fd, bytesex;

  fd = open("/dev/dsp", O_WRONLY);
  if(fd < 0) die("couldn't open /dev/dsp");

  bytesex = AFMT_S16_LE;
  if(ioctl(fd, SNDCTL_DSP_SETFMT, &bytesex))
    die("little-endian sound isn't implemented in this driver\n");

  printf("supposedly the sound driver supports little-endian data. :(\n");

  return 0;
}


Brad
brad at turbolinux.com | http://www.turbolinux.com/~brad/


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