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Initial proposal for selection of abstraction in simple mixer API.

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Added dB related functions (no implementation yet).
This commit is contained in:
Jaroslav Kysela 2004-03-14 18:39:58 +00:00
parent 894bd9157e
commit 81f8c76094
2 changed files with 34 additions and 2 deletions
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33
include/mixer.h
View File

@ -139,12 +139,33 @@ typedef enum _snd_mixer_selem_channel_id {
SND_MIXER_SCHN_MONO = SND_MIXER_SCHN_FRONT_LEFT
} snd_mixer_selem_channel_id_t;
/** Mixer simple element - register options - abstraction level */
enum snd_mixer_selem_regopt_abstract {
/** no abstraction - try use all universal controls from driver */
SND_MIXER_SABSTRACT_NONE = 0,
/** basic abstraction - Master,PCM,CD,Aux,Record-Gain etc. */
SND_MIXER_SABSTRACT_BASIC,
};
/** Mixer simple element - register options */
struct snd_mixer_selem_regopt {
/** structure version */
int ver;
/** v1: abstract layer selection */
enum snd_mixer_selem_regopt_abstract abstract;
/** v1: playback PCM connected to mixer device */
snd_pcm_t *playback_pcm;
/** v1: playback PCM connected to mixer device */
snd_pcm_t *capture_pcm;
};
/** Mixer simple element identifier */
typedef struct _snd_mixer_selem_id snd_mixer_selem_id_t;
const char *snd_mixer_selem_channel_name(snd_mixer_selem_channel_id_t channel);
int snd_mixer_selem_register(snd_mixer_t *mixer, void *arg,
int snd_mixer_selem_register(snd_mixer_t *mixer,
struct snd_mixer_selem_regopt *options,
snd_mixer_class_t **classp);
void snd_mixer_selem_get_id(snd_mixer_elem_t *element,
snd_mixer_selem_id_t *id);
@ -173,22 +194,32 @@ int snd_mixer_selem_has_capture_switch_exclusive(snd_mixer_elem_t *elem);
int snd_mixer_selem_get_playback_volume(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long *value);
int snd_mixer_selem_get_capture_volume(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long *value);
int snd_mixer_selem_get_playback_dB(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long *value);
int snd_mixer_selem_get_capture_dB(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long *value);
int snd_mixer_selem_get_playback_switch(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, int *value);
int snd_mixer_selem_get_capture_switch(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, int *value);
int snd_mixer_selem_set_playback_volume(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long value);
int snd_mixer_selem_set_capture_volume(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long value);
int snd_mixer_selem_set_playback_dB(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long value, int dir);
int snd_mixer_selem_set_capture_dB(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long value, int dir);
int snd_mixer_selem_set_playback_volume_all(snd_mixer_elem_t *elem, long value);
int snd_mixer_selem_set_capture_volume_all(snd_mixer_elem_t *elem, long value);
int snd_mixer_selem_set_playback_volume_dB(snd_mixer_elem_t *elem, long value, int dir);
int snd_mixer_selem_set_capture_volume_dB(snd_mixer_elem_t *elem, long value, int dir);
int snd_mixer_selem_set_playback_switch(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, int value);
int snd_mixer_selem_set_capture_switch(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, int value);
int snd_mixer_selem_set_playback_switch_all(snd_mixer_elem_t *elem, int value);
int snd_mixer_selem_set_capture_switch_all(snd_mixer_elem_t *elem, int value);
void snd_mixer_selem_get_playback_volume_range(snd_mixer_elem_t *elem,
long *min, long *max);
void snd_mixer_selem_get_playback_dB_range(snd_mixer_elem_t *elem,
long *min, long *max);
void snd_mixer_selem_set_playback_volume_range(snd_mixer_elem_t *elem,
long min, long max);
void snd_mixer_selem_get_capture_volume_range(snd_mixer_elem_t *elem,
long *min, long *max);
void snd_mixer_selem_get_capture_dB_range(snd_mixer_elem_t *elem,
long *min, long *max);
void snd_mixer_selem_set_capture_volume_range(snd_mixer_elem_t *elem,
long min, long max);

3
src/mixer/simple.c
View File

@ -1104,7 +1104,8 @@ static int simple_compare(const snd_mixer_elem_t *c1, const snd_mixer_elem_t *c2
* \param classp Pointer to returned mixer simple element class handle (or NULL)
* \return 0 on success otherwise a negative error code
*/
int snd_mixer_selem_register(snd_mixer_t *mixer, void *options ATTRIBUTE_UNUSED,
int snd_mixer_selem_register(snd_mixer_t *mixer, struct
snd_mixer_selem_regopt *options,
snd_mixer_class_t **classp)
{
snd_mixer_class_t *class = calloc(1, sizeof(*class));