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add api for manipulating volume balances

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This commit is contained in:
Lennart Poettering 2009-01-19 21:45:58 +01:00
parent 606cf8a2ec
commit 723d71a021
4 changed files with 136 additions and 0 deletions
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14
src/pulse/volume.h
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@ -233,6 +233,20 @@ pa_cvolume *pa_cvolume_remap(pa_cvolume *v, pa_channel_map *from, pa_channel_map
* the specified sample spec. \since 0.9.13 */
int pa_cvolume_compatible(const pa_cvolume *v, const pa_sample_spec *ss) PA_GCC_PURE;
/** Calculate a 'balance' value for the specified volume with the
* specified channel map. The return value will range from -1.0f
* (left) to +1.0f (right) \since 0.9.15 */
float pa_cvolume_get_balance(const pa_channel_map *map, const pa_cvolume *v) PA_GCC_PURE;
/** 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
* pa_cvolume_get_balance() is not guaranteed to actually return the
* requested balance (e.g. when the input volume was zero anyway for
* all channels)- \since 0.9.15 */
pa_cvolume* pa_cvolume_set_balance(const pa_channel_map *map, pa_cvolume *v, float new_balance);
PA_C_DECL_END
#endif