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implement pa_cvolume_{get|set}_fade

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Lennart Poettering 2009-01-30 00:15:40 +01:00
parent 9314db79db
commit 1b53f8297f
3 changed files with 130 additions and 2 deletions
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19
src/pulse/volume.h
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@ -242,12 +242,27 @@ float pa_cvolume_get_balance(const pa_cvolume *v, const pa_channel_map *map) PA_
/** Adjust the 'balance' value for the specified volume with the
* specified channel map. v will be modified in place and
* returned. The balance is a value between -1.0f and +1.0f. This
* operation might not be reversable! Also, after this call
* operation might not be reversible! Also, after this call
* pa_cvolume_get_balance() is not guaranteed to actually return the
* requested balance (e.g. when the input volume was zero anyway for
* requested balance value (e.g. when the input volume was zero anyway for
* all channels) \since 0.9.15 */
pa_cvolume* pa_cvolume_set_balance(pa_cvolume *v, const pa_channel_map *map, float new_balance);
/** Calculate a 'fade' value (i.e. 'balance' between front and rear)
* for the specified volume with the specified channel map. The return
* value will range from -1.0f (rear) to +1.0f (left) \since
* 0.9.15 */
float pa_cvolume_get_fade(const pa_cvolume *v, const pa_channel_map *map) PA_GCC_PURE;
/** Adjust the 'fade' value (i.e. 'balance' between front and rear)
* for the specified volume with the specified channel map. v will be
* modified in place and returned. The balance is a value between
* -1.0f and +1.0f. This operation might not be reversible! Also,
* after this call pa_cvolume_get_fade() is not guaranteed to
* actually return the requested fade value (e.g. when the input volume
* was zero anyway for all channels) \since 0.9.15 */
pa_cvolume* pa_cvolume_set_fade(pa_cvolume *v, const pa_channel_map *map, float new_fade);
/** Scale the passed pa_cvolume structure so that the maximum volume
* of all channels equals max. The proportions between the channel
* volumes are kept. \since 0.9.15 */