1#ifndef __SOUND_TLV_H 2#define __SOUND_TLV_H 3 4/* 5 * Advanced Linux Sound Architecture - ALSA - Driver 6 * Copyright (c) 2006 by Jaroslav Kysela <perex@perex.cz> 7 * 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 * 23 */ 24 25/* 26 * TLV structure is right behind the struct snd_ctl_tlv: 27 * unsigned int type - see SNDRV_CTL_TLVT_* 28 * unsigned int length 29 * .... data aligned to sizeof(unsigned int), use 30 * block_length = (length + (sizeof(unsigned int) - 1)) & 31 * ~(sizeof(unsigned int) - 1)) .... 32 */ 33 34#define SNDRV_CTL_TLVT_CONTAINER 0 /* one level down - group of TLVs */ 35#define SNDRV_CTL_TLVT_DB_SCALE 1 /* dB scale */ 36#define SNDRV_CTL_TLVT_DB_LINEAR 2 /* linear volume */ 37#define SNDRV_CTL_TLVT_DB_RANGE 3 /* dB range container */ 38#define SNDRV_CTL_TLVT_DB_MINMAX 4 /* dB scale with min/max */ 39#define SNDRV_CTL_TLVT_DB_MINMAX_MUTE 5 /* dB scale with min/max with mute */ 40 41#define TLV_DB_SCALE_ITEM(min, step, mute) \ 42 SNDRV_CTL_TLVT_DB_SCALE, 2 * sizeof(unsigned int), \ 43 (min), ((step) & 0xffff) | ((mute) ? 0x10000 : 0) 44#define DECLARE_TLV_DB_SCALE(name, min, step, mute) \ 45 unsigned int name[] = { TLV_DB_SCALE_ITEM(min, step, mute) } 46 47/* dB scale specified with min/max values instead of step */ 48#define TLV_DB_MINMAX_ITEM(min_dB, max_dB) \ 49 SNDRV_CTL_TLVT_DB_MINMAX, 2 * sizeof(unsigned int), \ 50 (min_dB), (max_dB) 51#define TLV_DB_MINMAX_MUTE_ITEM(min_dB, max_dB) \ 52 SNDRV_CTL_TLVT_DB_MINMAX_MUTE, 2 * sizeof(unsigned int), \ 53 (min_dB), (max_dB) 54#define DECLARE_TLV_DB_MINMAX(name, min_dB, max_dB) \ 55 unsigned int name[] = { TLV_DB_MINMAX_ITEM(min_dB, max_dB) } 56#define DECLARE_TLV_DB_MINMAX_MUTE(name, min_dB, max_dB) \ 57 unsigned int name[] = { TLV_DB_MINMAX_MUTE_ITEM(min_dB, max_dB) } 58 59/* linear volume between min_dB and max_dB (.01dB unit) */ 60#define TLV_DB_LINEAR_ITEM(min_dB, max_dB) \ 61 SNDRV_CTL_TLVT_DB_LINEAR, 2 * sizeof(unsigned int), \ 62 (min_dB), (max_dB) 63#define DECLARE_TLV_DB_LINEAR(name, min_dB, max_dB) \ 64 unsigned int name[] = { TLV_DB_LINEAR_ITEM(min_dB, max_dB) } 65 66/* dB range container */ 67/* Each item is: <min> <max> <TLV> */ 68/* The below assumes that each item TLV is 4 words like DB_SCALE or LINEAR */ 69#define TLV_DB_RANGE_HEAD(num) \ 70 SNDRV_CTL_TLVT_DB_RANGE, 6 * (num) * sizeof(unsigned int) 71 72#define TLV_DB_GAIN_MUTE -9999999 73 74#endif /* __SOUND_TLV_H */ 75