d24f5a9ad9
Userspace is not meant to have to handle all strange dB ranges, so add a specification comment. Signed-off-by: David Henningsson <david.henningsson@canonical.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
102 lines
4.0 KiB
C
102 lines
4.0 KiB
C
#ifndef __SOUND_TLV_H
|
|
#define __SOUND_TLV_H
|
|
|
|
/*
|
|
* Advanced Linux Sound Architecture - ALSA - Driver
|
|
* Copyright (c) 2006 by Jaroslav Kysela <perex@perex.cz>
|
|
*
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* TLV structure is right behind the struct snd_ctl_tlv:
|
|
* unsigned int type - see SNDRV_CTL_TLVT_*
|
|
* unsigned int length
|
|
* .... data aligned to sizeof(unsigned int), use
|
|
* block_length = (length + (sizeof(unsigned int) - 1)) &
|
|
* ~(sizeof(unsigned int) - 1)) ....
|
|
*/
|
|
|
|
#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 SNDRV_CTL_TLVT_DB_MINMAX 4 /* dB scale with min/max */
|
|
#define SNDRV_CTL_TLVT_DB_MINMAX_MUTE 5 /* dB scale with min/max with mute */
|
|
|
|
#define TLV_ITEM(type, ...) \
|
|
(type), TLV_LENGTH(__VA_ARGS__), __VA_ARGS__
|
|
#define TLV_LENGTH(...) \
|
|
((unsigned int)sizeof((const unsigned int[]) { __VA_ARGS__ }))
|
|
|
|
#define TLV_CONTAINER_ITEM(...) \
|
|
TLV_ITEM(SNDRV_CTL_TLVT_CONTAINER, __VA_ARGS__)
|
|
#define DECLARE_TLV_CONTAINER(name, ...) \
|
|
unsigned int name[] = { TLV_CONTAINER_ITEM(__VA_ARGS__) }
|
|
|
|
#define TLV_DB_SCALE_MASK 0xffff
|
|
#define TLV_DB_SCALE_MUTE 0x10000
|
|
#define TLV_DB_SCALE_ITEM(min, step, mute) \
|
|
TLV_ITEM(SNDRV_CTL_TLVT_DB_SCALE, \
|
|
(min), \
|
|
((step) & TLV_DB_SCALE_MASK) | \
|
|
((mute) ? TLV_DB_SCALE_MUTE : 0))
|
|
#define DECLARE_TLV_DB_SCALE(name, min, step, mute) \
|
|
unsigned int name[] = { TLV_DB_SCALE_ITEM(min, step, mute) }
|
|
|
|
/* dB scale specified with min/max values instead of step */
|
|
#define TLV_DB_MINMAX_ITEM(min_dB, max_dB) \
|
|
TLV_ITEM(SNDRV_CTL_TLVT_DB_MINMAX, (min_dB), (max_dB))
|
|
#define TLV_DB_MINMAX_MUTE_ITEM(min_dB, max_dB) \
|
|
TLV_ITEM(SNDRV_CTL_TLVT_DB_MINMAX_MUTE, (min_dB), (max_dB))
|
|
#define DECLARE_TLV_DB_MINMAX(name, min_dB, max_dB) \
|
|
unsigned int name[] = { TLV_DB_MINMAX_ITEM(min_dB, max_dB) }
|
|
#define DECLARE_TLV_DB_MINMAX_MUTE(name, min_dB, max_dB) \
|
|
unsigned int name[] = { TLV_DB_MINMAX_MUTE_ITEM(min_dB, max_dB) }
|
|
|
|
/* linear volume between min_dB and max_dB (.01dB unit) */
|
|
#define TLV_DB_LINEAR_ITEM(min_dB, max_dB) \
|
|
TLV_ITEM(SNDRV_CTL_TLVT_DB_LINEAR, (min_dB), (max_dB))
|
|
#define DECLARE_TLV_DB_LINEAR(name, min_dB, max_dB) \
|
|
unsigned int name[] = { TLV_DB_LINEAR_ITEM(min_dB, max_dB) }
|
|
|
|
/* 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
|
|
* dB values (which is also required for all other mixer controls).
|
|
*/
|
|
/* 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)
|
|
|
|
#define TLV_DB_GAIN_MUTE -9999999
|
|
|
|
/*
|
|
* channel-mapping TLV items
|
|
* TLV length must match with num_channels
|
|
*/
|
|
#define SNDRV_CTL_TLVT_CHMAP_FIXED 0x101 /* fixed channel position */
|
|
#define SNDRV_CTL_TLVT_CHMAP_VAR 0x102 /* channels freely swappable */
|
|
#define SNDRV_CTL_TLVT_CHMAP_PAIRED 0x103 /* pair-wise swappable */
|
|
|
|
#endif /* __SOUND_TLV_H */
|