In development period for Linux v4.18, a series of SNDRV_CTL_TLVO_XXX macro was introduced to kernel stuffs for position offset of TLV data.
This commit adds these macros to backport header in this library.
Signed-off-by: Takashi Sakamoto o-takashi@sakamocchi.jp --- include/sound/tlv.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
diff --git a/include/sound/tlv.h b/include/sound/tlv.h index b4df440c..2ea47685 100644 --- a/include/sound/tlv.h +++ b/include/sound/tlv.h @@ -41,6 +41,10 @@ #define SNDRV_CTL_TLVD_LENGTH(...) \ ((unsigned int)sizeof((const unsigned int[]) { __VA_ARGS__ }))
+/* Accessor offsets for TLV data items */ +#define SNDRV_CTL_TLVO_TYPE 0 +#define SNDRV_CTL_TLVO_LEN 1 + #define SNDRV_CTL_TLVD_CONTAINER_ITEM(...) \ SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_CONTAINER, __VA_ARGS__) #define SNDRV_CTL_TLVD_DECLARE_CONTAINER(name, ...) \ @@ -60,6 +64,10 @@ SNDRV_CTL_TLVD_DB_SCALE_ITEM(min, step, mute) \ }
+/* Accessor offsets for min, mute and step items in dB scale type TLV */ +#define SNDRV_CTL_TLVO_DB_SCALE_MIN 2 +#define SNDRV_CTL_TLVO_DB_SCALE_MUTE_AND_STEP 3 + /* dB scale specified with min/max values instead of step */ #define SNDRV_CTL_TLVD_DB_MINMAX_ITEM(min_dB, max_dB) \ SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_MINMAX, (min_dB), (max_dB)) @@ -74,6 +82,10 @@ SNDRV_CTL_TLVD_DB_MINMAX_MUTE_ITEM(min_dB, max_dB) \ }
+/* Accessor offsets for min, max items in db-minmax types of TLV. */ +#define SNDRV_CTL_TLVO_DB_MINMAX_MIN 2 +#define SNDRV_CTL_TLVO_DB_MINMAX_MAX 3 + /* linear volume between min_dB and max_dB (.01dB unit) */ #define SNDRV_CTL_TLVD_DB_LINEAR_ITEM(min_dB, max_dB) \ SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_LINEAR, (min_dB), (max_dB)) @@ -82,6 +94,10 @@ SNDRV_CTL_TLVD_DB_LINEAR_ITEM(min_dB, max_dB) \ }
+/* Accessor offsets for min, max items in db-linear type of TLV. */ +#define SNDRV_CTL_TLVO_DB_LINEAR_MIN 2 +#define SNDRV_CTL_TLVO_DB_LINEAR_MAX 3 + /* dB range container: * Items in dB range container must be ordered by their values and by their * dB values. This implies that larger values must correspond with larger