diff options
| author | Takashi Iwai <tiwai@suse.de> | 2006-08-28 13:20:13 +0200 |
|---|---|---|
| committer | Jaroslav Kysela <perex@suse.cz> | 2006-09-23 10:44:44 +0200 |
| commit | 063a40d9111ce7558f2fdfa4f85acfc47eb27353 (patch) | |
| tree | 66b1d91583d6fa1c4596c349bebc03a0363273cb /include/sound | |
| parent | 1f14d167f0233342eab53bb1a429ddad1e848de4 (diff) | |
[ALSA] Add the definition of linear volume TLV
Added the definition of linear volume TLV type.
Some DSP chips and codecs (e.g. AK codec) use linear volume control.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'include/sound')
| -rw-r--r-- | include/sound/tlv.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/sound/tlv.h b/include/sound/tlv.h index b826e1df1da..7905841643d 100644 --- a/include/sound/tlv.h +++ b/include/sound/tlv.h @@ -33,6 +33,7 @@ #define SNDRV_CTL_TLVT_CONTAINER 0 /* one level down - group of TLVs */ #define SNDRV_CTL_TLVT_DB_SCALE 1 /* dB scale */ +#define SNDRV_CTL_TLVT_DB_LINEAR 2 /* linear volume */ #define DECLARE_TLV_DB_SCALE(name, min, step, mute) \ unsigned int name[] = { \ @@ -40,4 +41,13 @@ unsigned int name[] = { \ (min), ((step) & 0xffff) | ((mute) ? 0x10000 : 0) \ } +/* linear volume between min_dB and max_dB (.01dB unit) */ +#define DECLARE_TLV_DB_LINEAR(name, min_dB, max_dB) \ +unsigned int name[] = { \ + SNDRV_CTL_TLVT_DB_LINEAR, 2 * sizeof(unsigned int), \ + (min_dB), (max_dB) \ +} + +#define TLV_DB_GAIN_MUTE -9999999 + #endif /* __SOUND_TLV_H */ |