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New universal switch v2.0 interface.

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This commit is contained in:
Jaroslav Kysela 1999-03-27 19:44:51 +00:00
parent e735bf70dd
commit 3f541735e3
9 changed files with 416 additions and 740 deletions
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62
src/mixer/mixer.c
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@ -275,64 +275,38 @@ int snd_mixer_channel_input_write(void *handle, int channel, snd_mixer_channel_d
return 0;
}
int snd_mixer_switches(void *handle)
{
snd_mixer_t *mixer;
int result;
mixer = (snd_mixer_t *) handle;
if (!mixer)
return -EINVAL;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_SWITCHES, &result) < 0)
return -errno;
return result;
}
int snd_mixer_switch(void *handle, const char *switch_id)
{
snd_mixer_t *mixer;
snd_mixer_switch_t uswitch;
int idx, switches, err;
mixer = (snd_mixer_t *) handle;
if (!mixer || !switch_id)
return -EINVAL;
/* bellow implementation isn't optimized for speed */
/* info about switches should be cached in the snd_mixer_t structure */
if ((switches = snd_mixer_switches(handle)) < 0)
return switches;
for (idx = 0; idx < switches; idx++) {
if ((err = snd_mixer_switch_read(handle, idx, &uswitch)) < 0)
return err;
if (!strncmp(switch_id, uswitch.name, sizeof(uswitch.name)))
return idx;
}
return -EINVAL;
}
int snd_mixer_switch_read(void *handle, int switchn, snd_mixer_switch_t * data)
int snd_mixer_switch_list(void *handle, snd_switch_list_t * list)
{
snd_mixer_t *mixer;
mixer = (snd_mixer_t *) handle;
if (!mixer || !data || switchn < 0)
if (!mixer || !list)
return -EINVAL;
bzero(data, sizeof(snd_mixer_switch_t));
data->switchn = switchn;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_SWITCH_READ, data) < 0)
if (ioctl(mixer->fd, SND_MIXER_IOCTL_SWITCH_LIST, &list) < 0)
return -errno;
return 0;
}
int snd_mixer_switch_write(void *handle, int switchn, snd_mixer_switch_t * data)
int snd_mixer_switch_read(void *handle, snd_switch_t * sw)
{
snd_mixer_t *mixer;
mixer = (snd_mixer_t *) handle;
if (!mixer || !data || switchn < 0)
if (!mixer || !sw || sw->name[0] == '\0')
return -EINVAL;
data->switchn = switchn;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_SWITCH_WRITE, data) < 0)
if (ioctl(mixer->fd, SND_MIXER_IOCTL_SWITCH_READ, sw) < 0)
return -errno;
return 0;
}
int snd_mixer_switch_write(void *handle, snd_switch_t * sw)
{
snd_mixer_t *mixer;
mixer = (snd_mixer_t *) handle;
if (!mixer || !sw || sw->name[0] == '\0')
return -EINVAL;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_SWITCH_WRITE, sw) < 0)
return -errno;
return 0;
}