diff options
Diffstat (limited to 'include/sound/emu10k1.h')
| -rw-r--r-- | include/sound/emu10k1.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/sound/emu10k1.h b/include/sound/emu10k1.h index 8e27f7074230..7bcb1a2d779a 100644 --- a/include/sound/emu10k1.h +++ b/include/sound/emu10k1.h @@ -415,6 +415,7 @@ SUB_REG(PTRX, PITCHTARGET, 0xffff0000) /* Pitch target of specified channel */ SUB_REG(PTRX, FXSENDAMOUNT_A, 0x0000ff00) /* Linear level of channel output sent to FX send bus A */ SUB_REG(PTRX, FXSENDAMOUNT_B, 0x000000ff) /* Linear level of channel output sent to FX send bus B */ +// Note: the volumes are raw multpliers, so real 100% is impossible. #define CVCF 0x02 /* Current volume and filter cutoff register */ SUB_REG(CVCF, CURRENTVOL, 0xffff0000) /* Current linear volume of specified channel */ SUB_REG(CVCF, CURRENTFILTER, 0x0000ffff) /* Current filter cutoff frequency of specified channel */ @@ -1477,6 +1478,8 @@ struct snd_emu10k1_pcm_mixer { /* mono, left, right x 8 sends (4 on emu10k1) */ unsigned char send_routing[3][8]; unsigned char send_volume[3][8]; + // 0x8000 is neutral. The mixer code rescales it to 0xffff to maintain + // backwards compatibility with user space. unsigned short attn[3]; struct snd_emu10k1_pcm *epcm; }; |