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https://github.com/alsa-project/alsa-lib.git
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ae564665ec
The recent update of sound/*.h to sync with the latest Linus uapi files broke the build of alsa-tools programs. These files used to be a modified version of Linux sound/* header files, so that they could be built without Linux headers. The special prefix like __user and other things were worked around there. We may do that again, but a better approach is to fix those things in Linux kernel uapi side, while we keep the minimal workaround in alsa-lib such as the __u16 and co type definitions. This patch is such an attempt, namely: - Keep the original $LINUX/uapi/sound/*.h in include/sound/uapi directory - The "fixes" are applied to some uapi headers, so that they don't contain Linux-specific prefix and use of opaque struct like snd_ctl_elem_id - The uapi headers are included indirectly from include/sound/*.h - Some headers have inclusion of type_compat.h for the Linux variable types and prefixes - type_compat.h tries to use <linux/types.h> when __linux__ is defined, instead of the own conflicting definitions The last type might need a bit more adjustment depending on the compiler, but it can be fixed locally without disturbing else. Signed-off-by: Takashi Iwai <tiwai@suse.de>
117 lines
4.5 KiB
C
117 lines
4.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __UAPI_SOUND_TLV_H
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#define __UAPI_SOUND_TLV_H
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#define SNDRV_CTL_TLVT_CONTAINER 0 /* one level down - group of TLVs */
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#define SNDRV_CTL_TLVT_DB_SCALE 1 /* dB scale */
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#define SNDRV_CTL_TLVT_DB_LINEAR 2 /* linear volume */
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#define SNDRV_CTL_TLVT_DB_RANGE 3 /* dB range container */
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#define SNDRV_CTL_TLVT_DB_MINMAX 4 /* dB scale with min/max */
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#define SNDRV_CTL_TLVT_DB_MINMAX_MUTE 5 /* dB scale with min/max with mute */
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/*
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* channel-mapping TLV items
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* TLV length must match with num_channels
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*/
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#define SNDRV_CTL_TLVT_CHMAP_FIXED 0x101 /* fixed channel position */
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#define SNDRV_CTL_TLVT_CHMAP_VAR 0x102 /* channels freely swappable */
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#define SNDRV_CTL_TLVT_CHMAP_PAIRED 0x103 /* pair-wise swappable */
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/*
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* TLV structure is right behind the struct snd_ctl_tlv:
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* unsigned int type - see SNDRV_CTL_TLVT_*
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* unsigned int length
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* .... data aligned to sizeof(unsigned int), use
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* block_length = (length + (sizeof(unsigned int) - 1)) &
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* ~(sizeof(unsigned int) - 1)) ....
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*/
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#define SNDRV_CTL_TLVD_ITEM(type, ...) \
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(type), SNDRV_CTL_TLVD_LENGTH(__VA_ARGS__), __VA_ARGS__
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#define SNDRV_CTL_TLVD_LENGTH(...) \
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((unsigned int)sizeof((const unsigned int[]) { __VA_ARGS__ }))
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/* Accessor offsets for TLV data items */
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#define SNDRV_CTL_TLVO_TYPE 0
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#define SNDRV_CTL_TLVO_LEN 1
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#define SNDRV_CTL_TLVD_CONTAINER_ITEM(...) \
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SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_CONTAINER, __VA_ARGS__)
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#define SNDRV_CTL_TLVD_DECLARE_CONTAINER(name, ...) \
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unsigned int name[] = { \
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SNDRV_CTL_TLVD_CONTAINER_ITEM(__VA_ARGS__) \
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}
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#define SNDRV_CTL_TLVD_DB_SCALE_MASK 0xffff
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#define SNDRV_CTL_TLVD_DB_SCALE_MUTE 0x10000
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#define SNDRV_CTL_TLVD_DB_SCALE_ITEM(min, step, mute) \
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SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_SCALE, \
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(min), \
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((step) & SNDRV_CTL_TLVD_DB_SCALE_MASK) | \
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((mute) ? SNDRV_CTL_TLVD_DB_SCALE_MUTE : 0))
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#define SNDRV_CTL_TLVD_DECLARE_DB_SCALE(name, min, step, mute) \
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unsigned int name[] = { \
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SNDRV_CTL_TLVD_DB_SCALE_ITEM(min, step, mute) \
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}
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/* Accessor offsets for min, mute and step items in dB scale type TLV */
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#define SNDRV_CTL_TLVO_DB_SCALE_MIN 2
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#define SNDRV_CTL_TLVO_DB_SCALE_MUTE_AND_STEP 3
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/* dB scale specified with min/max values instead of step */
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#define SNDRV_CTL_TLVD_DB_MINMAX_ITEM(min_dB, max_dB) \
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SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_MINMAX, (min_dB), (max_dB))
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#define SNDRV_CTL_TLVD_DB_MINMAX_MUTE_ITEM(min_dB, max_dB) \
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SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_MINMAX_MUTE, (min_dB), (max_dB))
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#define SNDRV_CTL_TLVD_DECLARE_DB_MINMAX(name, min_dB, max_dB) \
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unsigned int name[] = { \
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SNDRV_CTL_TLVD_DB_MINMAX_ITEM(min_dB, max_dB) \
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}
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#define SNDRV_CTL_TLVD_DECLARE_DB_MINMAX_MUTE(name, min_dB, max_dB) \
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unsigned int name[] = { \
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SNDRV_CTL_TLVD_DB_MINMAX_MUTE_ITEM(min_dB, max_dB) \
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}
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/* Accessor offsets for min, max items in db-minmax types of TLV. */
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#define SNDRV_CTL_TLVO_DB_MINMAX_MIN 2
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#define SNDRV_CTL_TLVO_DB_MINMAX_MAX 3
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/* linear volume between min_dB and max_dB (.01dB unit) */
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#define SNDRV_CTL_TLVD_DB_LINEAR_ITEM(min_dB, max_dB) \
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SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_LINEAR, (min_dB), (max_dB))
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#define SNDRV_CTL_TLVD_DECLARE_DB_LINEAR(name, min_dB, max_dB) \
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unsigned int name[] = { \
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SNDRV_CTL_TLVD_DB_LINEAR_ITEM(min_dB, max_dB) \
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}
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/* Accessor offsets for min, max items in db-linear type of TLV. */
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#define SNDRV_CTL_TLVO_DB_LINEAR_MIN 2
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#define SNDRV_CTL_TLVO_DB_LINEAR_MAX 3
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/* dB range container:
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* Items in dB range container must be ordered by their values and by their
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* dB values. This implies that larger values must correspond with larger
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* dB values (which is also required for all other mixer controls).
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*/
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/* Each item is: <min> <max> <TLV> */
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#define SNDRV_CTL_TLVD_DB_RANGE_ITEM(...) \
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SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_RANGE, __VA_ARGS__)
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#define SNDRV_CTL_TLVD_DECLARE_DB_RANGE(name, ...) \
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unsigned int name[] = { \
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SNDRV_CTL_TLVD_DB_RANGE_ITEM(__VA_ARGS__) \
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}
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#define SNDRV_CTL_TLVD_DB_GAIN_MUTE -9999999
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#endif
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