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Legacy microphone volume mapping

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This commit is contained in:
Kagamiin~
2024-03-22 11:17:34 -03:00
parent d41e791aec
commit 937537f78e
1 changed files with 5 additions and 1 deletions
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6
src/sound/snd_ess.c
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@@ -59,11 +59,15 @@ static const double sb_att_7dbstep_2bits[] = {
164.0, 6537.0, 14637.0, 32767.0
};
/* Attenuation table for 4-bit microphone volume.
* The last step is a jump to -48 dB. */
static const double sb_att_1p4dbstep_4bits[] = {
164.0, 3431.0, 4031.0, 4736.0, 5565.0, 6537.0, 7681.0, 9025.0,
10603.0, 12458.0, 14637.0, 17196.0, 20204.0, 23738.0, 27889.0, 32767.0
};
/* Attenuation table for 4-bit mixer avolume.
* The last step is a jump to -48 dB. */
static const double sb_att_2dbstep_4bits[] = {
164.0, 1304.0, 1641.0, 2067.0, 2602.0, 3276.0, 4125.0, 5192.0,
6537.0, 8230.0, 10362.0, 13044.0, 16422.0, 20674.0, 26027.0, 32767.0
@@ -177,7 +181,7 @@ ess_mixer_write(uint16_t addr, uint8_t val, void *priv)
{
uint8_t mic_vol_2bit = (mixer->regs[0x0a] >> 1) & 0x3;
mixer->mic_l = mixer->mic_r = sb_att_7dbstep_2bits[mic_vol_2bit] / 32768.0;
mixer->regs[0x1A] = mic_vol_2bit | (mic_vol_2bit << 2);
mixer->regs[0x1A] = mic_vol_2bit | (mic_vol_2bit << 2) | (mic_vol_2bit << 4) | (mic_vol_2bit << 6);
break;
}