From 55a29af5ed5d914f017e6a7c613a4d7cc34f82d9 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Wed, 6 Sep 2006 12:15:34 +0200 Subject: [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: Takashi Iwai Signed-off-by: Jaroslav Kysela --- include/sound/tlv.h | 23 +++++++++++++++-------- 1 file changed, 15 insertions(+), 8 deletions(-) (limited to 'include') diff --git a/include/sound/tlv.h b/include/sound/tlv.h index 7905841643df..d93a96b91875 100644 --- a/include/sound/tlv.h +++ b/include/sound/tlv.h @@ -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 TLV_DB_SCALE_ITEM(min, step, mute) \ + SNDRV_CTL_TLVT_DB_SCALE, 2 * sizeof(unsigned int), \ + (min), ((step) & 0xffff) | ((mute) ? 0x10000 : 0) #define DECLARE_TLV_DB_SCALE(name, min, step, mute) \ -unsigned int name[] = { \ - SNDRV_CTL_TLVT_DB_SCALE, 2 * sizeof(unsigned int), \ - (min), ((step) & 0xffff) | ((mute) ? 0x10000 : 0) \ -} + unsigned int name[] = { TLV_DB_SCALE_ITEM(min, step, mute) } /* linear volume between min_dB and max_dB (.01dB unit) */ +#define TLV_DB_LINEAR_ITEM(min_dB, max_dB) \ + SNDRV_CTL_TLVT_DB_LINEAR, 2 * sizeof(unsigned int), \ + (min_dB), (max_dB) #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) \ -} + unsigned int name[] = { TLV_DB_LINEAR_ITEM(min_dB, max_dB) } + +/* dB range container */ +/* Each item is: */ +/* 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 -- cgit v1.2.3