Commit 063a40d9 authored by Takashi Iwai's avatar Takashi Iwai Committed by Jaroslav Kysela
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[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: default avatarTakashi Iwai <tiwai@suse.de>
Signed-off-by: default avatarJaroslav Kysela <perex@suse.cz>
parent 1f14d167

include/sound/tlv.h

+10 −0
Original line number Diff line number Diff line
@@ -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 */