diff options
Diffstat (limited to 'mix.c')
| -rw-r--r-- | mix.c | 75 |
1 files changed, 75 insertions, 0 deletions
@@ -0,0 +1,75 @@ +/* + * dump current mixer settings + * + * (c) 1998 Gerd Knorr <kraxel@goldbach.in-berlin.de> + * + */ +#include <stdio.h> +#include <stdlib.h> +#include <fcntl.h> +#include <unistd.h> +#include <errno.h> +#include <sys/ioctl.h> +#include <sys/soundcard.h> + +char *labels[] = SOUND_DEVICE_LABELS; +char *names[] = SOUND_DEVICE_NAMES; + +int +dump_mixer(char *devname) +{ + struct mixer_info info; + int mix,i,devmask,recmask,recsrc,stereomask,volume; + + if (-1 == (mix = open(devname,O_RDONLY))) + return -1; + + printf("%s",devname); + if (-1 != ioctl(mix,SOUND_MIXER_INFO,&info)) + printf(" = %s (%s)",info.id,info.name); + printf("\n"); + + if (-1 == ioctl(mix,MIXER_READ(SOUND_MIXER_DEVMASK),&devmask) || + -1 == ioctl(mix,MIXER_READ(SOUND_MIXER_STEREODEVS),&stereomask) || + -1 == ioctl(mix,MIXER_READ(SOUND_MIXER_RECMASK),&recmask) || + -1 == ioctl(mix,MIXER_READ(SOUND_MIXER_RECSRC),&recsrc)) { + perror("mixer ioctl"); + return -1; + } + + for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) { + if ((1<<i) & devmask) { + if (-1 == ioctl(mix,MIXER_READ(i),&volume)) { + perror("mixer read volume"); + return -1; + } + printf(" %-10s (%2d) : %s %s%s", + names[i],i, + (1<<i) & stereomask ? "stereo" : "mono ", + (1<<i) & recmask ? "rec" : " ", + (1<<i) & recsrc ? "*" : " "); + if ((1<<i) & stereomask) + printf(" %d/%d\n",volume & 0xff,(volume >> 8) & 0xff); + else + printf(" %d\n",volume & 0xff); + } + } + return 0; +} + +int +main(int argc, char *argv[]) +{ + char devname[32]; + int i; + + /* first mixer device. If "mixer0" does'nt work, try "mixer" */ + if (-1 == dump_mixer("/dev/mixer0")) + dump_mixer("/dev/mixer"); + /* other more devices */ + for (i = 1; i < 8; i++) { + sprintf(devname,"/dev/mixer%d",i); + dump_mixer(devname); + } + return 0; +} |