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Mixer enhancements..

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This commit is contained in:
Jaroslav Kysela 1999-07-19 08:26:24 +00:00
parent 05498059c3
commit 0a512c7d25
2 changed files with 27 additions and 2 deletions
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2
include/mixer.h
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@ -30,6 +30,8 @@ int snd_mixer_group(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_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_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_element_write(snd_mixer_t *handle, snd_mixer_element_t * element);
int snd_mixer_channel_read(snd_mixer_t *handle, snd_mixer_channels_t * channels);
int snd_mixer_channel_write(snd_mixer_t *handle, snd_mixer_channels_t * channels);
int snd_mixer_read(snd_mixer_t *handle, snd_mixer_callbacks_t * callbacks); 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); void snd_mixer_set_bit(unsigned int *bitmap, int bit, int val);

27
src/mixer/mixer.c
View file

@ -29,7 +29,7 @@
#include "asoundlib.h" #include "asoundlib.h"
#define SND_FILE_MIXER "/dev/snd/mixerC%iD%i" #define SND_FILE_MIXER "/dev/snd/mixerC%iD%i"
#define SND_MIXER_VERSION_MAX SND_PROTOCOL_VERSION(2, 0, 0) #define SND_MIXER_VERSION_MAX SND_PROTOCOL_VERSION(2, 1, 0)
struct snd_mixer { struct snd_mixer {
int card; int card;
@ -168,7 +168,6 @@ int snd_mixer_element_info(snd_mixer_t *handle, snd_mixer_element_info_t * info)
return 0; return 0;
} }
int snd_mixer_element_read(snd_mixer_t *handle, snd_mixer_element_t * element) int snd_mixer_element_read(snd_mixer_t *handle, snd_mixer_element_t * element)
{ {
snd_mixer_t *mixer; snd_mixer_t *mixer;
@ -193,6 +192,30 @@ int snd_mixer_element_write(snd_mixer_t *handle, snd_mixer_element_t * element)
return 0; return 0;
} }
int snd_mixer_channel_read(snd_mixer_t *handle, snd_mixer_channels_t * channels)
{
snd_mixer_t *mixer;
mixer = handle;
if (!mixer)
return -EINVAL;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_CHANNEL_READ, channels) < 0)
return -errno;
return 0;
}
int snd_mixer_channel_write(snd_mixer_t *handle, snd_mixer_channels_t * channels)
{
snd_mixer_t *mixer;
mixer = handle;
if (!mixer)
return -EINVAL;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_CHANNEL_WRITE, channels) < 0)
return -errno;
return 0;
}
int snd_mixer_read(snd_mixer_t *handle, snd_mixer_callbacks_t * callbacks) int snd_mixer_read(snd_mixer_t *handle, snd_mixer_callbacks_t * callbacks)
{ {
snd_mixer_t *mixer; snd_mixer_t *mixer;