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Commit 55a29af5 authored by Takashi Iwai's avatar Takashi Iwai Committed by Jaroslav Kysela
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[ALSA] Add definition of TLV dB range compound 



Added the definition of TLV dB range compound.  It contains one or
more dB-range or linear-volume TLV entries with min/max ranges.
Used for volume controls with non-linear curves.

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
Signed-off-by: default avatarJaroslav Kysela <perex@suse.cz>
parent 311e70a4

include/sound/tlv.h

+15 −8
Original line number Diff line number Diff line
@@ -34,19 +34,26 @@ 
#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 SNDRV_CTL_TLVT_DB_RANGE 3	/* dB range container */



#define DECLARE_TLV_DB_SCALE(name, min, step, mute) \

unsigned int name[] = { \

#define TLV_DB_SCALE_ITEM(min, step, mute)			\

	SNDRV_CTL_TLVT_DB_SCALE, 2 * sizeof(unsigned int),	\

        (min), ((step) & 0xffff) | ((mute) ? 0x10000 : 0) \

}

	(min), ((step) & 0xffff) | ((mute) ? 0x10000 : 0)

#define DECLARE_TLV_DB_SCALE(name, min, step, mute) \

	unsigned int name[] = { TLV_DB_SCALE_ITEM(min, step, mute) }



/* linear volume between min_dB and max_dB (.01dB unit) */

#define DECLARE_TLV_DB_LINEAR(name, min_dB, max_dB)	\

unsigned int name[] = { \

#define TLV_DB_LINEAR_ITEM(min_dB, max_dB)		    \

	SNDRV_CTL_TLVT_DB_LINEAR, 2 * sizeof(unsigned int), \

        (min_dB), (max_dB)				\

}

	(min_dB), (max_dB)

#define DECLARE_TLV_DB_LINEAR(name, min_dB, max_dB)	\

	unsigned int name[] = { TLV_DB_LINEAR_ITEM(min_dB, max_dB) }



/* dB range container */

/* Each item is: <min> <max> <TLV> */

/* The below assumes that each item TLV is 4 words like DB_SCALE or LINEAR */

#define TLV_DB_RANGE_HEAD(num)			\

	SNDRV_CTL_TLVT_DB_RANGE, 6 * (num) * sizeof(unsigned int)



#define TLV_DB_GAIN_MUTE	-9999999