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#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <assert.h>
#include <sys/soundcard.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "oss-util.h"
int pa_oss_open(const char *device, int *mode, int* pcaps) {
int fd = -1;
assert(device && mode && (*mode == O_RDWR || *mode == O_RDONLY || *mode == O_WRONLY));
if (*mode == O_RDWR) {
if ((fd = open(device, O_RDWR|O_NDELAY)) >= 0) {
int dcaps, *tcaps;
ioctl(fd, SNDCTL_DSP_SETDUPLEX, 0);
tcaps = pcaps ? pcaps : &dcaps;
if (ioctl(fd, SNDCTL_DSP_GETCAPS, tcaps) < 0) {
fprintf(stderr, __FILE__": SNDCTL_DSP_GETCAPS: %s\n", strerror(errno));
goto fail;
}
if (*tcaps & DSP_CAP_DUPLEX)
return fd;
close(fd);
}
if ((fd = open(device, (*mode = O_WRONLY)|O_NDELAY)) < 0) {
if ((fd = open(device, (*mode = O_RDONLY)|O_NDELAY)) < 0) {
fprintf(stderr, __FILE__": open('%s'): %s\n", device, strerror(errno));
goto fail;
}
}
} else {
if ((fd = open(device, *mode|O_NDELAY)) < 0) {
fprintf(stderr, __FILE__": open('%s'): %s\n", device, strerror(errno));
goto fail;
}
}
if (pcaps) {
if (ioctl(fd, SNDCTL_DSP_GETCAPS, pcaps) < 0) {
fprintf(stderr, "SNDCTL_DSP_GETCAPS: %s\n", strerror(errno));
goto fail;
}
}
return fd;
fail:
if (fd >= 0)
close(fd);
return fd;
}
int pa_oss_auto_format(int fd, struct pa_sample_spec *ss) {
int format, channels, speed, reqformat;
static const int format_trans[] = {
[PA_SAMPLE_U8] = AFMT_U8,
[PA_SAMPLE_ALAW] = AFMT_A_LAW,
[PA_SAMPLE_ULAW] = AFMT_MU_LAW,
[PA_SAMPLE_S16LE] = AFMT_S16_LE,
[PA_SAMPLE_S16BE] = AFMT_S16_BE,
[PA_SAMPLE_FLOAT32LE] = AFMT_QUERY, /* not supported */
[PA_SAMPLE_FLOAT32BE] = AFMT_QUERY, /* not supported */
};
assert(fd >= 0 && ss);
reqformat = format = format_trans[ss->format];
if (reqformat == AFMT_QUERY || ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != reqformat) {
format = AFMT_S16_NE;
if (ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != AFMT_S16_NE) {
int f = AFMT_S16_NE == AFMT_S16_LE ? AFMT_S16_BE : AFMT_S16_LE;
format = f;
if (ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != f) {
format = AFMT_U8;
if (ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != AFMT_U8) {
fprintf(stderr, "SNDCTL_DSP_SETFMT: %s\n", format != AFMT_U8 ? "No supported sample format" : strerror(errno));
return -1;
} else
ss->format = PA_SAMPLE_U8;
} else
ss->format = f == AFMT_S16_LE ? PA_SAMPLE_S16LE : PA_SAMPLE_S16BE;
} else
ss->format = PA_SAMPLE_S16NE;
}
channels = ss->channels;
if (ioctl(fd, SNDCTL_DSP_CHANNELS, &channels) < 0) {
fprintf(stderr, "SNDCTL_DSP_CHANNELS: %s\n", strerror(errno));
return -1;
}
assert(channels);
ss->channels = channels;
speed = ss->rate;
if (ioctl(fd, SNDCTL_DSP_SPEED, &speed) < 0) {
fprintf(stderr, "SNDCTL_DSP_SPEED: %s\n", strerror(errno));
return -1;
}
assert(speed);
ss->rate = speed;
return 0;
}
static int log2(int v) {
int k = 0;
for (;;) {
v >>= 1;
if (!v) break;
k++;
}
return k;
}
int pa_oss_set_fragments(int fd, int nfrags, int frag_size) {
int arg;
arg = ((int) nfrags << 16) | log2(frag_size);
if (ioctl(fd, SNDCTL_DSP_SETFRAGMENT, &arg) < 0) {
fprintf(stderr, "SNDCTL_DSP_SETFRAGMENT: %s\n", strerror(errno));
return -1;
}
return 0;
}
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