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alsa: clean up volume min/max values

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This commit is contained in:
Wim Taymans 2023-01-20 09:29:59 +01:00
parent 1442fa7da7
commit eadab2ffe3
1 changed files with 7 additions and 8 deletions
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15
pipewire-alsa/alsa-plugins/ctl_pipewire.c
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@ -37,24 +37,23 @@
PW_LOG_TOPIC_STATIC(alsa_log_topic, "alsa.ctl");
#define PW_LOG_TOPIC_DEFAULT alsa_log_topic
#define VOLUME_MAX 65536
#define VOLUME_MUTED ((uint32_t) 0U)
#define VOLUME_NORM ((uint32_t) 0x10000U)
#define VOLUME_MIN ((uint32_t) 0U)
#define VOLUME_MAX ((uint32_t) 0x10000U)
static inline uint32_t volume_from_linear(float vol)
{
uint32_t v;
if (vol <= 0.0f)
v = VOLUME_MUTED;
v = VOLUME_MIN;
else
v = SPA_CLAMP((uint64_t) lround(cbrt(vol) * VOLUME_NORM),
VOLUME_MUTED, VOLUME_MAX);
v = SPA_CLAMP((uint64_t) lround(cbrt(vol) * VOLUME_MAX),
VOLUME_MIN, VOLUME_MAX);
return v;
}
static inline float volume_to_linear(uint32_t vol)
{
float v = ((float)vol) / VOLUME_NORM;
float v = ((float)vol) / VOLUME_MAX;
return v * v * v;
}
@ -437,7 +436,7 @@ static int pipewire_get_integer_info(snd_ctl_ext_t * ext,
long *imax, long *istep)
{
*istep = 1;
*imin = 0;
*imin = VOLUME_MIN;
*imax = VOLUME_MAX;
return 0;