mirrors/alsa-lib
1
0
Fork 0
mirror of https://github.com/alsa-project/alsa-lib.git synced 2025-10-29 05:40:25 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

control: add a series of macro for offset of several types of TLV

Browse source 
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>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2018-05-15 21:36:34 +09:00 • committed by Takashi Iwai
parent 44f499bb22
commit 5eb78219f6
1 changed files with 16 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

16
include/sound/tlv.h
View file

@ -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