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Mixer read filter...

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This commit is contained in:
Jaroslav Kysela 1999-07-27 19:45:10 +00:00
parent 9f2bbd5677
commit 79e733f00d
2 changed files with 21 additions and 8 deletions
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1
include/mixer.h
View file

@ -31,6 +31,7 @@ int snd_mixer_group_write(snd_mixer_t *handle, snd_mixer_group_t * group);
int snd_mixer_element_info(snd_mixer_t *handle, snd_mixer_element_info_t * info);
int snd_mixer_element_read(snd_mixer_t *handle, snd_mixer_element_t * element);
int snd_mixer_element_write(snd_mixer_t *handle, snd_mixer_element_t * element);
int snd_mixer_read_filter(snd_mixer_t *handle, snd_mixer_filter_t * filter);
int snd_mixer_read(snd_mixer_t *handle, snd_mixer_callbacks_t * callbacks);
void snd_mixer_set_bit(unsigned int *bitmap, int bit, int val);

28
src/mixer/mixer.c
View file

@ -113,7 +113,7 @@ int snd_mixer_elements(snd_mixer_t *handle, snd_mixer_elements_t * elements)
snd_mixer_t *mixer;
mixer = handle;
if (!mixer)
if (!mixer || !elements)
return -EINVAL;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_ELEMENTS, elements) < 0)
return -errno;
@ -125,7 +125,7 @@ int snd_mixer_routes(snd_mixer_t *handle, snd_mixer_routes_t * routes)
snd_mixer_t *mixer;
mixer = handle;
if (!mixer)
if (!mixer || !routes)
return -EINVAL;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_ROUTES, routes) < 0)
return -errno;
@ -137,7 +137,7 @@ int snd_mixer_groups(snd_mixer_t *handle, snd_mixer_groups_t * groups)
snd_mixer_t *mixer;
mixer = handle;
if (!mixer)
if (!mixer || !groups)
return -EINVAL;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_GROUPS, groups) < 0)
return -errno;
@ -149,7 +149,7 @@ int snd_mixer_group_read(snd_mixer_t *handle, snd_mixer_group_t * group)
snd_mixer_t *mixer;
mixer = handle;
if (!mixer)
if (!mixer || !group)
return -EINVAL;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_GROUP_READ, group) < 0)
return -errno;
@ -161,7 +161,7 @@ int snd_mixer_group_write(snd_mixer_t *handle, snd_mixer_group_t * group)
snd_mixer_t *mixer;
mixer = handle;
if (!mixer)
if (!mixer || !group)
return -EINVAL;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_GROUP_WRITE, group) < 0)
return -errno;
@ -173,7 +173,7 @@ int snd_mixer_element_info(snd_mixer_t *handle, snd_mixer_element_info_t * info)
snd_mixer_t *mixer;
mixer = handle;
if (!mixer)
if (!mixer || !info)
return -EINVAL;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_ELEMENT_INFO, info) < 0)
return -errno;
@ -185,7 +185,7 @@ int snd_mixer_element_read(snd_mixer_t *handle, snd_mixer_element_t * element)
snd_mixer_t *mixer;
mixer = handle;
if (!mixer)
if (!mixer || !element)
return -EINVAL;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_ELEMENT_READ, element) < 0)
return -errno;
@ -197,13 +197,25 @@ int snd_mixer_element_write(snd_mixer_t *handle, snd_mixer_element_t * element)
snd_mixer_t *mixer;
mixer = handle;
if (!mixer)
if (!mixer || !element)
return -EINVAL;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_ELEMENT_WRITE, element) < 0)
return -errno;
return 0;
}
int snd_mixer_read_filter(snd_mixer_t *handle, snd_mixer_filter_t * filter)
{
snd_mixer_t *mixer;
mixer = handle;
if (!mixer || !filter)
return -EINVAL;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_READ_FILTER, filter) < 0)
return -errno;
return 0;
}
int snd_mixer_read(snd_mixer_t *handle, snd_mixer_callbacks_t * callbacks)
{
snd_mixer_t *mixer;