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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <stdio.h>
#ifndef HAVE_SYS_SOUNDCARD_H
int main(int argc, char *argv[])
{
fprintf(stderr, "Platform does not support OSS\n");
exit(1);
}
#else
#include <sys/time.h>
#include <unistd.h>
#include <sched.h>
#include <sys/soundcard.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <fcntl.h>
#define AUDIOPATH "/dev/dsp"
#define NTESTS 16
#define SAMPLE_RATE 8000
#ifndef MAP_FAILED
#define MAP_FAILED ((caddr_t)(-1))
#endif
#define FULL_MMAP
static char *testit(void)
{
size_t pagesize = getpagesize();
struct sched_param schp;
unsigned int times[NTESTS];
int i, fd, apar;
struct audio_buf_info iinfo;
caddr_t ibuf, ibufe;
unsigned int isize;
struct timeval tv;
unsigned int avg, tm;
if ((schp.sched_priority = sched_get_priority_min(SCHED_RR)) == -1)
return "sched_get_priority_min";
if (sched_setscheduler(0, SCHED_RR, &schp))
return "sched_setscheduler";
for (i = 0; i < NTESTS; i++) {
if ((fd = open(AUDIOPATH, O_RDWR, 0)) < 0)
return "open";
apar = AFMT_S16_LE;
if (ioctl(fd, SNDCTL_DSP_SETFMT, &apar) == -1)
return "ioctl: SNDCTL_DSP_SETFMT";
if (apar != AFMT_S16_LE)
return "audio driver does not support AFMT_S16_LE";
apar = 0;
if (ioctl(fd, SNDCTL_DSP_STEREO, &apar) == -1)
return "ioctl: SNDCTL_DSP_STEREO";
if (apar != 0)
return "audio driver does not support mono";
apar = SAMPLE_RATE;
if (ioctl(fd, SNDCTL_DSP_SPEED, &apar) == -1)
return "ioctl: SNDCTL_DSP_SPEED";
if (apar != SAMPLE_RATE)
if (abs(apar-SAMPLE_RATE) >= SAMPLE_RATE/100)
return "audio driver does not support 8kHz sampling frequency";
apar = 0xffff0007U;
if (ioctl(fd, SNDCTL_DSP_SETFRAGMENT, &apar) == -1)
return "ioctl: SNDCTL_DSP_SETFRAGMENT";
if (ioctl(fd, SNDCTL_DSP_GETISPACE, &iinfo) == -1)
return "ioctl: SNDCTL_DSP_GETISPACE";
isize = iinfo.fragstotal * iinfo.fragsize;
if (ioctl(fd, SNDCTL_DSP_GETCAPS, &apar) == -1)
return "ioctl: SNDCTL_DSP_GETCAPS";
if (!(apar & DSP_CAP_TRIGGER) || !(apar & DSP_CAP_MMAP))
return "Sound driver does not support mmap and/or trigger";
#ifdef FULL_MMAP
if ((ibuf = mmap(NULL, pagesize+isize, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0)) == MAP_FAILED)
return "mmap: MAP_ANONYMOUS";
ibufe = ibuf + isize;
if (munmap(ibuf, isize))
return "munmap: MAP_ANONYMOUS";
if ((ibuf = mmap(ibuf, isize, PROT_READ, MAP_FILE | MAP_SHARED | MAP_FIXED, fd, 0)) == MAP_FAILED)
return "mmap: PROT_READ";
#else /* FULL_MMAP */
if ((ibuf = mmap(NULL, isize, PROT_READ, MAP_FILE | MAP_SHARED | MAP_FIXED, fd, 0)) == MAP_FAILED)
return "mmap: PROT_READ";
#endif /* FULL_MMAP */
apar = 0;
if (ioctl(fd, SNDCTL_DSP_SETTRIGGER, &apar) == -1)
return "ioctl: SNDCTL_DSP_SETTRIGGER";
apar = PCM_ENABLE_INPUT;
if (ioctl(fd, SNDCTL_DSP_SETTRIGGER, &apar) == -1)
return "ioctl: SNDCTL_DSP_SETTRIGGER";
if (gettimeofday(&tv, NULL))
return "gettimeofday";
times[i] = tv.tv_usec;
if (munmap(ibuf, isize))
return "munmap";
#ifdef FULL_MMAP
if (munmap(ibufe, pagesize))
return "munmap";
#endif /* FULL_MMAP */
if (close(fd))
return "close";
}
printf("Results (us):");
for (avg = 0, i = 1; i < NTESTS; i++) {
printf(" %d", (tm = (1000000+times[i]-times[i-1]) % 1000000));
avg += tm;
}
printf("\nAverage (us): %d\n", (avg + NTESTS/2) / NTESTS);
return NULL;
}
int main(int argc, char *argv[])
{
char *c;
if ((c = testit()))
perror(c);
exit(0);
}
#endif
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