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oss: add support for sio_setvol(). 

From Tobias Kortkamp <tobik@FreeBSD.org>, thanks.
This commit is contained in:
Alexandre Ratchov 2018-03-02 07:32:49 +01:00
parent 31cfb9b6dc
commit f1cd80bb72
1 changed files with 40 additions and 2 deletions
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42
libsndio/sio_oss.c
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@ -108,6 +108,8 @@ static int sio_oss_xrun(struct sio_oss_hdl *);
static size_t sio_oss_read(struct sio_hdl *, void *, size_t);
static size_t sio_oss_write(struct sio_hdl *, const void *, size_t);
static void sio_oss_close(struct sio_hdl *);
static int sio_oss_setvol(struct sio_hdl *, unsigned int);
static void sio_oss_getvol(struct sio_hdl *);
static struct sio_ops sio_oss_ops = {
sio_oss_close,
@ -121,8 +123,8 @@ static struct sio_ops sio_oss_ops = {
sio_oss_nfds,
sio_oss_pollfd,
sio_oss_revents,
NULL, /* setvol */
NULL, /* getvol */
sio_oss_setvol,
sio_oss_getvol,
};
/*
@ -768,4 +770,40 @@ sio_oss_revents(struct sio_hdl *sh, struct pollfd *pfd)
return revents;
}
static int
sio_oss_setvol(struct sio_hdl *sh, unsigned int vol)
{
struct sio_oss_hdl *hdl = (struct sio_oss_hdl *)sh;
int newvol;
/* Scale to 0..100 */
newvol = 1.0 * 100 * vol / SIO_MAXVOL;
newvol = newvol | (newvol << 8);
if (ioctl(hdl->fd, SNDCTL_DSP_SETPLAYVOL, &newvol) < 0) {
DPERROR("sio_oss_setvol");
hdl->sio.eof = 1;
return 0;
}
return 1;
}
static void
sio_oss_getvol(struct sio_hdl *sh)
{
struct sio_oss_hdl *hdl = (struct sio_oss_hdl *)sh;
int vol;
if (ioctl(hdl->fd, SNDCTL_DSP_GETPLAYVOL, &vol) < 0) {
DPERROR("sio_oss_getvol");
hdl->sio.eof = 1;
return;
}
/* Use left channel volume and scale to SIO_MAXVOL */
vol = SIO_MAXVOL * 1.0 * (vol & 0x7f) / 100;
_sio_onvol_cb(&hdl->sio, vol);
}
#endif /* defined USE_OSS */