mirror of
https://github.com/torvalds/linux.git
synced 2024-11-27 22:51:35 +00:00
61 lines
2.3 KiB
C
61 lines
2.3 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 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[] = { 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[] = { 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
|
|
|
|
#endif /* __SOUND_TLV_H */
|