The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/sound/pcm/matrix.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2007-2009 Ariff Abdullah <ariff@FreeBSD.org>
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  *
   28  * $FreeBSD: stable/12/sys/dev/sound/pcm/matrix.h 326255 2017-11-27 14:52:40Z pfg $
   29  */
   30 
   31 #ifndef _SND_MATRIX_H_
   32 #define _SND_MATRIX_H_
   33 
   34 #undef SND_MULTICHANNEL
   35 #ifndef SND_OLDSTEREO
   36 #define SND_MULTICHANNEL        1
   37 #endif
   38 
   39 /*
   40  * XXX = unused, but part of the definition (will be used someday, maybe).
   41  */
   42 #define SND_CHN_T_FL            0       /* Front Left         */
   43 #define SND_CHN_T_FR            1       /* Front Right        */
   44 #define SND_CHN_T_FC            2       /* Front Center       */
   45 #define SND_CHN_T_LF            3       /* Low Frequency      */
   46 #define SND_CHN_T_BL            4       /* Back Left          */
   47 #define SND_CHN_T_BR            5       /* Back Right         */
   48 #define SND_CHN_T_FLC           6       /* Front Left Center  XXX */
   49 #define SND_CHN_T_FRC           7       /* Front Right Center XXX */
   50 #define SND_CHN_T_BC            8       /* Back Center        */
   51 #define SND_CHN_T_SL            9       /* Side Left          */
   52 #define SND_CHN_T_SR            10      /* Side Right         */
   53 #define SND_CHN_T_TC            11      /* Top Center         XXX */
   54 #define SND_CHN_T_TFL           12      /* Top Front Left     XXX */
   55 #define SND_CHN_T_TFC           13      /* Top Front Center   XXX */
   56 #define SND_CHN_T_TFR           14      /* Top Front Right    XXX */
   57 #define SND_CHN_T_TBL           15      /* Top Back Left      XXX */
   58 #define SND_CHN_T_TBC           16      /* Top Back Center    XXX */
   59 #define SND_CHN_T_TBR           17      /* Top Back Right     XXX */
   60 #define SND_CHN_T_MAX           18      /* Maximum channels   */
   61 
   62 #define SND_CHN_T_ZERO          (SND_CHN_T_MAX + 1)     /* Zero samples */
   63 
   64 #define SND_CHN_T_LABELS        {                                       \
   65          "fl",  "fr",  "fc",  "lf",  "bl",  "br",                       \
   66         "flc", "frc",  "bc",  "sl",  "sr",  "tc",                       \
   67         "tfl", "tfc", "tfr", "tbl", "tbc", "tbr"                        \
   68 }
   69 
   70 #define SND_CHN_T_NAMES {                                               \
   71         "Front Left", "Front Right", "Front Center",                    \
   72         "Low Frequency Effects",                                        \
   73         "Back Left", "Back Right",                                      \
   74         "Front Left Center", "Front Right Center",                      \
   75         "Back Center",                                                  \
   76         "Side Left", "Side Right",                                      \
   77         "Top Center",                                                   \
   78         "Top Front Left", "Top Front Center", "Top Front Right",        \
   79         "Top Back Left", "Top Back Center", "Top Back Right"            \
   80 }
   81 
   82 #define SND_CHN_T_MASK_FL       (1 << SND_CHN_T_FL)
   83 #define SND_CHN_T_MASK_FR       (1 << SND_CHN_T_FR)
   84 #define SND_CHN_T_MASK_FC       (1 << SND_CHN_T_FC)
   85 #define SND_CHN_T_MASK_LF       (1 << SND_CHN_T_LF)
   86 #define SND_CHN_T_MASK_BL       (1 << SND_CHN_T_BL)
   87 #define SND_CHN_T_MASK_BR       (1 << SND_CHN_T_BR)
   88 #define SND_CHN_T_MASK_FLC      (1 << SND_CHN_T_FLC)
   89 #define SND_CHN_T_MASK_FRC      (1 << SND_CHN_T_FRC)
   90 #define SND_CHN_T_MASK_BC       (1 << SND_CHN_T_BC)
   91 #define SND_CHN_T_MASK_SL       (1 << SND_CHN_T_SL)
   92 #define SND_CHN_T_MASK_SR       (1 << SND_CHN_T_SR)
   93 #define SND_CHN_T_MASK_TC       (1 << SND_CHN_T_TC)
   94 #define SND_CHN_T_MASK_TFL      (1 << SND_CHN_T_TFL)
   95 #define SND_CHN_T_MASK_TFC      (1 << SND_CHN_T_TFC)
   96 #define SND_CHN_T_MASK_TFR      (1 << SND_CHN_T_TFR)
   97 #define SND_CHN_T_MASK_TBL      (1 << SND_CHN_T_TBL)
   98 #define SND_CHN_T_MASK_TBC      (1 << SND_CHN_T_TBC)
   99 #define SND_CHN_T_MASK_TBR      (1 << SND_CHN_T_TBR)
  100 
  101 #define SND_CHN_LEFT_MASK       (SND_CHN_T_MASK_FL  |                   \
  102                                  SND_CHN_T_MASK_BL  |                   \
  103                                  SND_CHN_T_MASK_FLC |                   \
  104                                  SND_CHN_T_MASK_SL  |                   \
  105                                  SND_CHN_T_MASK_TFL |                   \
  106                                  SND_CHN_T_MASK_TBL)
  107 
  108 #define SND_CHN_RIGHT_MASK      (SND_CHN_T_MASK_FR  |                   \
  109                                  SND_CHN_T_MASK_BR  |                   \
  110                                  SND_CHN_T_MASK_FRC |                   \
  111                                  SND_CHN_T_MASK_SR  |                   \
  112                                  SND_CHN_T_MASK_TFR |                   \
  113                                  SND_CHN_T_MASK_TBR)
  114 
  115 #define SND_CHN_CENTER_MASK     (SND_CHN_T_MASK_FC  |                   \
  116                                  SND_CHN_T_MASK_BC  |                   \
  117                                  SND_CHN_T_MASK_TC  |                   \
  118                                  SND_CHN_T_MASK_TFC |                   \
  119                                  SND_CHN_T_MASK_TBC |                   \
  120                                  SND_CHN_T_MASK_LF)     /* XXX what?!? */
  121 
  122 /*
  123  * Matrix identity.
  124  */
  125 
  126 /* 1 @ Mono 1.0 */
  127 #define SND_CHN_MATRIX_1_0      0
  128 #define SND_CHN_MATRIX_1        SND_CHN_MATRIX_1_0
  129 
  130 /* 2 @ Stereo 2.0 */
  131 #define SND_CHN_MATRIX_2_0      1
  132 #define SND_CHN_MATRIX_2        SND_CHN_MATRIX_2_0      
  133 
  134 /* 3 @ 2.1 (lfe), 3.0 (rear center, DEFAULT) */
  135 #define SND_CHN_MATRIX_2_1      2
  136 #define SND_CHN_MATRIX_3_0      3
  137 #define SND_CHN_MATRIX_3        SND_CHN_MATRIX_3_0
  138 
  139 /* 4 @ 3.1 (lfe), 4.0 (Quadraphonic, DEFAULT) */
  140 #define SND_CHN_MATRIX_3_1      4
  141 #define SND_CHN_MATRIX_4_0      5
  142 #define SND_CHN_MATRIX_4        SND_CHN_MATRIX_4_0
  143 
  144 /* 5 @ 4.1 (lfe), 5.0 (center, DEFAULT) */
  145 #define SND_CHN_MATRIX_4_1      6
  146 #define SND_CHN_MATRIX_5_0      7
  147 #define SND_CHN_MATRIX_5        SND_CHN_MATRIX_5_0
  148 
  149 /* 6 @ 5.1 (lfe, DEFAULT), 6.0 (rear center) */
  150 #define SND_CHN_MATRIX_5_1      8
  151 #define SND_CHN_MATRIX_6_0      9
  152 #define SND_CHN_MATRIX_6        SND_CHN_MATRIX_5_1
  153 
  154 /* 7 @ 6.1 (lfe, DEFAULT), 7.0 */
  155 #define SND_CHN_MATRIX_6_1      10
  156 #define SND_CHN_MATRIX_7_0      11
  157 #define SND_CHN_MATRIX_7        SND_CHN_MATRIX_6_1
  158 
  159 /* 8 @ 7.1 (lfe) */
  160 #define SND_CHN_MATRIX_7_1      12
  161 #define SND_CHN_MATRIX_8        SND_CHN_MATRIX_7_1
  162 
  163 #define SND_CHN_MATRIX_MAX      13
  164 
  165 #define SND_CHN_MATRIX_BEGIN    SND_CHN_MATRIX_1_0
  166 #define SND_CHN_MATRIX_END      SND_CHN_MATRIX_7_1
  167 
  168 /* Custom matrix identity */
  169 #define SND_CHN_MATRIX_DRV              -4      /* driver own identity   */
  170 #define SND_CHN_MATRIX_PCMCHANNEL       -3      /* PCM channel identity  */
  171 #define SND_CHN_MATRIX_MISC             -2      /* misc, custom defined  */
  172 #define SND_CHN_MATRIX_UNKNOWN          -1      /* unknown               */
  173 
  174 #define SND_CHN_T_VOL_0DB       SND_CHN_T_MAX
  175 #define SND_CHN_T_VOL_MAX       (SND_CHN_T_VOL_0DB + 1)
  176 
  177 #define SND_CHN_T_BEGIN         SND_CHN_T_FL
  178 #define SND_CHN_T_END           SND_CHN_T_TBR
  179 #define SND_CHN_T_STEP          1
  180 #define SND_CHN_MIN             1
  181 
  182 #ifdef SND_MULTICHANNEL
  183 #define SND_CHN_MAX             8
  184 #else
  185 #define SND_CHN_MAX             2
  186 #endif
  187 
  188 /*
  189  * Multichannel interleaved volume matrix. Each calculated value relative
  190  * to master and 0db will be stored in each CLASS + 1 as long as
  191  * chn_setvolume_matrix() or the equivalent CHN_SETVOLUME() macros is
  192  * used (see channel.c).
  193  */
  194 #define SND_VOL_C_MASTER        0
  195 #define SND_VOL_C_PCM           1
  196 #define SND_VOL_C_PCM_VAL       2
  197 #define SND_VOL_C_MAX           3
  198 
  199 #define SND_VOL_C_BEGIN         SND_VOL_C_PCM
  200 #define SND_VOL_C_END           SND_VOL_C_PCM
  201 #define SND_VOL_C_STEP          2
  202 
  203 #define SND_VOL_C_VAL(x)        ((x) + 1)
  204 
  205 #define SND_VOL_0DB_MIN         1
  206 #define SND_VOL_0DB_MAX         100
  207 
  208 #define SND_VOL_0DB_MASTER      100
  209 #define SND_VOL_0DB_PCM         45
  210 
  211 #define SND_VOL_RESOLUTION      8
  212 #define SND_VOL_FLAT            (1 << SND_VOL_RESOLUTION)
  213 
  214 #define SND_VOL_CALC_SAMPLE(x, y)       (((x) * (y)) >> SND_VOL_RESOLUTION)
  215 
  216 #define SND_VOL_CALC_VAL(x, y, z)                                       \
  217                         (((((x)[y][z] << SND_VOL_RESOLUTION) /          \
  218                          (x)[y][SND_CHN_T_VOL_0DB]) *                   \
  219                          (x)[SND_VOL_C_MASTER][z]) /                    \
  220                          (x)[SND_VOL_C_MASTER][SND_CHN_T_VOL_0DB])      \
  221 
  222 #endif  /* !_SND_MATRIX_H_ */

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