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implemented integer volume <-> dB volume conversion functions for simple mixer

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This commit is contained in:
Jaroslav Kysela 2008-04-21 11:44:20 +02:00
parent 82af1df465
commit 058dde8b7d
5 changed files with 139 additions and 2 deletions
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58
src/mixer/simple.c
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@ -357,6 +357,35 @@ int snd_mixer_selem_has_playback_switch_joined(snd_mixer_elem_t *elem)
return COND_CAPS(elem, SM_CAP_PSWITCH_JOIN);
}
/**
* \brief Return corresponding dB value to an integer playback volume for a mixer simple element
* \param elem Mixer simple element handle
* \param value value to be converted to dB range
* \param dBvalue pointer to returned dB value
* \return 0 on success otherwise a negative error code
*/
int snd_mixer_selem_ask_playback_vol_dB(snd_mixer_elem_t *elem, long value, long *dBvalue)
{
CHECK_BASIC(elem);
CHECK_DIR(elem, SM_CAP_PVOLUME);
return sm_selem_ops(elem)->ask_vol_dB(elem, SM_PLAY, value, dBvalue);
}
/**
* \brief Return corresponding integer playback volume for given dB value for a mixer simple element
* \param elem Mixer simple element handle
* \param value value to be converted to dB range
* \param dir select direction (-1 = accurate or first bellow, 0 = accurate, 1 = accurate or first above)
* \param dBvalue pointer to returned dB value
* \return 0 on success otherwise a negative error code
*/
int snd_mixer_selem_ask_playback_dB_vol(snd_mixer_elem_t *elem, long dBvalue, int dir, long *value)
{
CHECK_BASIC(elem);
CHECK_DIR(elem, SM_CAP_PVOLUME);
return sm_selem_ops(elem)->ask_dB_vol(elem, SM_PLAY, dBvalue, value, dir);
}
/**
* \brief Return value of playback volume control of a mixer simple element
* \param elem Mixer simple element handle
@ -657,6 +686,35 @@ int snd_mixer_selem_get_capture_group(snd_mixer_elem_t *elem)
return s->capture_group;
}
/**
* \brief Return corresponding dB value to an integer capture volume for a mixer simple element
* \param elem Mixer simple element handle
* \param value value to be converted to dB range
* \param dBvalue pointer to returned dB value
* \return 0 on success otherwise a negative error code
*/
int snd_mixer_selem_ask_capture_vol_dB(snd_mixer_elem_t *elem, long value, long *dBvalue)
{
CHECK_BASIC(elem);
CHECK_DIR(elem, SM_CAP_CVOLUME);
return sm_selem_ops(elem)->ask_vol_dB(elem, SM_CAPT, value, dBvalue);
}
/**
* \brief Return corresponding integer capture volume for given dB value for a mixer simple element
* \param elem Mixer simple element handle
* \param dBvalue dB value to be converted to integer range
* \param value pointer to returned integer value
* \param dir select direction (-1 = accurate or first bellow, 0 = accurate, 1 = accurate or first above)
* \return 0 on success otherwise a negative error code
*/
int snd_mixer_selem_ask_capture_dB_vol(snd_mixer_elem_t *elem, long dBvalue, int dir, long *value)
{
CHECK_BASIC(elem);
CHECK_DIR(elem, SM_CAP_CVOLUME);
return sm_selem_ops(elem)->ask_dB_vol(elem, SM_CAPT, dBvalue, value, dir);
}
/**
* \brief Return value of capture volume control of a mixer simple element
* \param elem Mixer simple element handle