diff options
author | Lennart Poettering <lennart@poettering.net> | 2009-08-19 02:32:36 +0200 |
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committer | Lennart Poettering <lennart@poettering.net> | 2009-08-19 02:32:36 +0200 |
commit | cfef930036572e2770a4c17e57f139737a99444a (patch) | |
tree | 379dda7eaafe5a5d29b53a0cbd53fbf895f6c8af /src/pulse | |
parent | 1421eff0b69f6b0173835afe6b857d39e719d1d0 (diff) |
volume: introduce pa_cvolume_{inc|dec}()
Diffstat (limited to 'src/pulse')
-rw-r--r-- | src/pulse/volume.c | 34 | ||||
-rw-r--r-- | src/pulse/volume.h | 8 |
2 files changed, 42 insertions, 0 deletions
diff --git a/src/pulse/volume.c b/src/pulse/volume.c index 3dcf3157..234c3f72 100644 --- a/src/pulse/volume.c +++ b/src/pulse/volume.c @@ -876,3 +876,37 @@ pa_cvolume* pa_cvolume_merge(pa_cvolume *dest, const pa_cvolume *a, const pa_cvo return dest; } + +pa_cvolume* pa_cvolume_inc(pa_cvolume *v, pa_volume_t inc) { + pa_volume_t m; + + pa_assert(v); + + pa_return_val_if_fail(pa_cvolume_valid(v), NULL); + + m = pa_cvolume_max(v); + + if (m >= PA_VOLUME_MAX - inc) + m = PA_VOLUME_MAX; + else + m += inc; + + return pa_cvolume_scale(v, m); +} + +pa_cvolume* pa_cvolume_dec(pa_cvolume *v, pa_volume_t dec) { + pa_volume_t m; + + pa_assert(v); + + pa_return_val_if_fail(pa_cvolume_valid(v), NULL); + + m = pa_cvolume_max(v); + + if (m <= PA_VOLUME_MUTED + dec) + m = PA_VOLUME_MUTED; + else + m -= dec; + + return pa_cvolume_scale(v, m); +} diff --git a/src/pulse/volume.h b/src/pulse/volume.h index 349ca49f..543b0af1 100644 --- a/src/pulse/volume.h +++ b/src/pulse/volume.h @@ -345,6 +345,14 @@ pa_volume_t pa_cvolume_get_position(pa_cvolume *cv, const pa_channel_map *map, p * and dest may point to the same structure. \since 0.9.16 */ pa_cvolume* pa_cvolume_merge(pa_cvolume *dest, const pa_cvolume *a, const pa_cvolume *b); +/** Increase the volume passed in by 'inc'. The proportions between + * the channels are kept. \since 0.9.16 */ +pa_cvolume* pa_cvolume_inc(pa_cvolume *v, pa_volume_t inc); + +/** Increase the volume passed in by 'inc'. The proportions between + * the channels are kept. \since 0.9.16 */ +pa_cvolume* pa_cvolume_dec(pa_cvolume *v, pa_volume_t dec); + PA_C_DECL_END #endif |