From da45617efc5e3be26d6410857a730c94b32fe24b Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Sun, 24 Oct 2004 00:48:02 +0000 Subject: add user volume API git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@255 fefdeb5f-60dc-0310-8127-8f9354f1896f --- polyp/sample.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'polyp/sample.c') diff --git a/polyp/sample.c b/polyp/sample.c index 8c30386b..7048311c 100644 --- a/polyp/sample.c +++ b/polyp/sample.c @@ -125,6 +125,22 @@ double pa_volume_to_dB(pa_volume_t v) { return 20*log10((double) v/PA_VOLUME_NORM); } +#define USER_DECIBEL_RANGE 30 + +double pa_volume_to_user(pa_volume_t v) { + double dB = pa_volume_to_dB(v); + + return dB < -USER_DECIBEL_RANGE ? 0 : dB/USER_DECIBEL_RANGE+1; +} + +pa_volume_t pa_volume_from_user(double v) { + + if (v <= 0) + return PA_VOLUME_MUTED; + + return pa_volume_from_dB((v-1)*USER_DECIBEL_RANGE); +} + void pa_bytes_snprint(char *s, size_t l, unsigned v) { if (v >= ((unsigned) 1024)*1024*1024) snprintf(s, l, "%0.1f GB", ((double) v)/1024/1024/1024); -- cgit