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authorClemens Ladisch <clemens@ladisch.de>2011-11-20 17:17:35 +0100
committerTakashi Iwai <tiwai@suse.de>2012-07-16 10:02:18 +0200
commitbf1d1c9b6179faa3bc32cee882462bc8eebde25d (patch)
treeaa3cc05edf9606d2bad631b2661bfd67ddfe8942 /include/sound/tlv.h
parent570aef5de13df21e42eeb90db67e2436bee91bd4 (diff)
downloadop-kernel-dev-bf1d1c9b6179faa3bc32cee882462bc8eebde25d.zip
op-kernel-dev-bf1d1c9b6179faa3bc32cee882462bc8eebde25d.tar.gz
ALSA: tlv: add DECLARE_TLV_DB_RANGE()
Add a DECLARE_TLV_DB_RANGE() macro so that dB range information can be specified without having to count the items manually for TLV_DB_RANGE_HEAD(). Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include/sound/tlv.h')
-rw-r--r--include/sound/tlv.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/sound/tlv.h b/include/sound/tlv.h
index a9ff3db..a64d8fe 100644
--- a/include/sound/tlv.h
+++ b/include/sound/tlv.h
@@ -76,6 +76,10 @@
/* dB range container */
/* Each item is: <min> <max> <TLV> */
+#define TLV_DB_RANGE_ITEM(...) \
+ TLV_ITEM(SNDRV_CTL_TLVT_DB_RANGE, __VA_ARGS__)
+#define DECLARE_TLV_DB_RANGE(name, ...) \
+ unsigned int name[] = { TLV_DB_RANGE_ITEM(__VA_ARGS__) }
/* 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)
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