mirrors/alsa-lib
1
0
Fork 0
mirror of https://github.com/alsa-project/alsa-lib.git synced 2025-11-03 09:01:52 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Recoded the universal switch interface...

Browse source
This commit is contained in:
Jaroslav Kysela 1999-05-04 19:21:28 +00:00
parent a5b307a711
commit 6e72ca3977
8 changed files with 42 additions and 204 deletions
Download patch file Download diff file Expand all files Collapse all files

33
src/control/control.c
View file

@ -450,3 +450,36 @@ int snd_ctl_rawmidi_input_switch_write(void *handle, int dev, snd_switch_t * sw)
return -errno;
return 0;
}
int snd_control_read(void *handle, snd_ctl_callbacks_t * callbacks)
{
snd_ctl_t *ctl;
int result, count;
snd_ctl_read_t r;
ctl = (snd_ctl_t *) handle;
if (!ctl)
return -EINVAL;
count = 0;
while ((result = read(ctl->fd, &r, sizeof(r))) > 0) {
if (result != sizeof(r))
return -EIO;
if (!callbacks)
continue;
switch (r.cmd) {
case SND_CTL_READ_REBUILD:
if (callbacks->rebuild)
callbacks->rebuild(callbacks->private_data);
break;
case SND_CTL_READ_SWITCH_VALUE:
case SND_CTL_READ_SWITCH_CHANGE:
case SND_CTL_READ_SWITCH_ADD:
case SND_CTL_READ_SWITCH_REMOVE:
if (callbacks->xswitch)
callbacks->xswitch(callbacks->private_data, r.cmd, r.data.sw.iface, &r.data.sw.switem);
break;
}
count++;
}
return result >= 0 ? count : -errno;
}