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| author | Takashi Iwai <tiwai@suse.de> | 2006-09-06 12:15:34 +0200 |
|---|---|---|
| committer | Jaroslav Kysela <perex@suse.cz> | 2006-09-23 10:46:11 +0200 |
| commit | 55a29af5ed5d914f017e6a7c613a4d7cc34f82d9 (patch) | |
| tree | 74f44500e741a0ad0cbfd5bb182b3d98da107401 /include/sound/tlv.h | |
| parent | 311e70a4741c736795da082da7290164d9cf3726 (diff) | |
| download | linux-55a29af5ed5d914f017e6a7c613a4d7cc34f82d9.tar.gz | |
[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 <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'include/sound/tlv.h')
| -rw-r--r-- | include/sound/tlv.h | 23 |
1 files changed, 15 insertions, 8 deletions
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: <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 |