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- #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_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 */
- /* 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 */
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