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/feeder.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org>
    5  * Copyright (c) 1999 Cameron Grant <cg@FreeBSD.org>
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  * $FreeBSD: stable/12/sys/dev/sound/pcm/feeder.h 326255 2017-11-27 14:52:40Z pfg $
   30  */
   31 
   32 struct pcm_feederdesc {
   33         u_int32_t type;
   34         u_int32_t in, out;
   35         u_int32_t flags;
   36         int idx;
   37 };
   38 
   39 struct feeder_class {
   40         KOBJ_CLASS_FIELDS;
   41         struct pcm_feederdesc *desc;
   42         void *data;
   43 };
   44 
   45 struct pcm_feeder {
   46         KOBJ_FIELDS;
   47         int align;
   48         struct pcm_feederdesc *desc, desc_static;
   49         void *data;
   50         struct feeder_class *class;
   51         struct pcm_feeder *source, *parent;
   52 
   53 };
   54 
   55 void feeder_register(void *p);
   56 struct feeder_class *feeder_getclass(struct pcm_feederdesc *desc);
   57 
   58 u_int32_t snd_fmtscore(u_int32_t fmt);
   59 u_int32_t snd_fmtbestbit(u_int32_t fmt, u_int32_t *fmts);
   60 u_int32_t snd_fmtbestchannel(u_int32_t fmt, u_int32_t *fmts);
   61 u_int32_t snd_fmtbest(u_int32_t fmt, u_int32_t *fmts);
   62 
   63 int chn_addfeeder(struct pcm_channel *c, struct feeder_class *fc,
   64     struct pcm_feederdesc *desc);
   65 int chn_removefeeder(struct pcm_channel *c);
   66 struct pcm_feeder *chn_findfeeder(struct pcm_channel *c, u_int32_t type);
   67 void feeder_printchain(struct pcm_feeder *head);
   68 int feeder_chain(struct pcm_channel *);
   69 
   70 #define FEEDER_DECLARE(feeder, pdata)                                   \
   71 static struct feeder_class feeder ## _class = {                         \
   72         .name =         #feeder,                                        \
   73         .methods =      feeder ## _methods,                             \
   74         .size =         sizeof(struct pcm_feeder),                      \
   75         .desc =         feeder ## _desc,                                \
   76         .data =         pdata,                                          \
   77 };                                                                      \
   78 SYSINIT(feeder, SI_SUB_DRIVERS, SI_ORDER_ANY, feeder_register,          \
   79     &feeder ## _class)
   80 
   81 enum {
   82         FEEDER_ROOT,
   83         FEEDER_FORMAT,
   84         FEEDER_MIXER,
   85         FEEDER_RATE,
   86         FEEDER_EQ,
   87         FEEDER_VOLUME,
   88         FEEDER_MATRIX,
   89         FEEDER_LAST,
   90 };
   91 
   92 /* feeder_format */
   93 enum {
   94         FEEDFORMAT_CHANNELS
   95 };
   96 
   97 /* feeder_mixer */
   98 enum {
   99         FEEDMIXER_CHANNELS
  100 };
  101 
  102 /* feeder_rate */
  103 enum {
  104         FEEDRATE_SRC,
  105         FEEDRATE_DST,
  106         FEEDRATE_QUALITY,
  107         FEEDRATE_CHANNELS
  108 };
  109 
  110 #define FEEDRATE_RATEMIN        1
  111 #define FEEDRATE_RATEMAX        2016000         /* 48000 * 42 */
  112 #define FEEDRATE_MIN            1
  113 #define FEEDRATE_MAX            0x7fffff        /* sign 24bit ~ 8ghz ! */
  114 #define FEEDRATE_ROUNDHZ        25
  115 #define FEEDRATE_ROUNDHZ_MIN    0
  116 #define FEEDRATE_ROUNDHZ_MAX    500
  117 
  118 extern int feeder_rate_min;
  119 extern int feeder_rate_max;
  120 extern int feeder_rate_round;
  121 extern int feeder_rate_quality;
  122 
  123 /* feeder_eq */
  124 enum {
  125         FEEDEQ_CHANNELS,
  126         FEEDEQ_RATE,
  127         FEEDEQ_TREBLE,
  128         FEEDEQ_BASS,
  129         FEEDEQ_PREAMP,
  130         FEEDEQ_STATE,
  131         FEEDEQ_DISABLE,
  132         FEEDEQ_ENABLE,
  133         FEEDEQ_BYPASS,
  134         FEEDEQ_UNKNOWN
  135 };
  136 
  137 int feeder_eq_validrate(uint32_t);
  138 void feeder_eq_initsys(device_t);
  139 
  140 /* feeder_volume */
  141 enum {
  142         FEEDVOLUME_CLASS,
  143         FEEDVOLUME_CHANNELS,
  144         FEEDVOLUME_STATE,
  145         FEEDVOLUME_ENABLE,
  146         FEEDVOLUME_BYPASS
  147 };
  148 
  149 int feeder_volume_apply_matrix(struct pcm_feeder *, struct pcmchan_matrix *);
  150 
  151 /* feeder_matrix */
  152 int feeder_matrix_default_id(uint32_t);
  153 struct pcmchan_matrix *feeder_matrix_default_channel_map(uint32_t);
  154 
  155 uint32_t feeder_matrix_default_format(uint32_t);
  156 
  157 int feeder_matrix_format_id(uint32_t);
  158 struct pcmchan_matrix *feeder_matrix_format_map(uint32_t);
  159 
  160 struct pcmchan_matrix *feeder_matrix_id_map(int);
  161 
  162 int feeder_matrix_setup(struct pcm_feeder *, struct pcmchan_matrix *,
  163     struct pcmchan_matrix *);
  164 int feeder_matrix_compare(struct pcmchan_matrix *, struct pcmchan_matrix *);
  165 
  166 /* 4Front OSS stuffs */
  167 int feeder_matrix_oss_get_channel_order(struct pcmchan_matrix *,
  168     unsigned long long *);
  169 int feeder_matrix_oss_set_channel_order(struct pcmchan_matrix *,
  170     unsigned long long *);
  171 
  172 #if 0
  173 /* feeder_matrix */
  174 enum {
  175         FEEDMATRIX_TYPE,
  176         FEEDMATRIX_RESET,
  177         FEEDMATRIX_CHANNELS_IN,
  178         FEEDMATRIX_CHANNELS_OUT,
  179         FEEDMATRIX_SET_MAP
  180 };
  181 
  182 enum {
  183         FEEDMATRIX_TYPE_NONE,
  184         FEEDMATRIX_TYPE_AUTO,
  185         FEEDMATRIX_TYPE_2X1,
  186         FEEDMATRIX_TYPE_1X2,
  187         FEEDMATRIX_TYPE_2X2
  188 };
  189 
  190 #define FEEDMATRIX_TYPE_STEREO_TO_MONO  FEEDMATRIX_TYPE_2X1
  191 #define FEEDMATRIX_TYPE_MONO_TO_STEREO  FEEDMATRIX_TYPE_1X2
  192 #define FEEDMATRIX_TYPE_SWAP_STEREO     FEEDMATRIX_TYPE_2X2
  193 #define FEEDMATRIX_MAP(x, y)            ((((x) & 0x3f) << 6) | ((y) & 0x3f))
  194 #define FEEDMATRIX_MAP_SRC(x)           ((x) & 0x3f)
  195 #define FEEDMATRIX_MAP_DST(x)           (((x) >> 6) & 0x3f)
  196 #endif
  197 
  198 /*
  199  * By default, various feeders only deal with sign 16/32 bit native-endian
  200  * since it should provide the fastest processing path. Processing 8bit samples
  201  * is too noisy due to limited dynamic range, while 24bit is quite slow due to
  202  * unnatural per-byte read/write. However, for debugging purposes, ensuring
  203  * implementation correctness and torture test, the following can be defined:
  204  *
  205  *      SND_FEEDER_MULTIFORMAT - Compile all type of converters, but force
  206  *                               8bit samples to be converted to 16bit
  207  *                               native-endian for better dynamic range.
  208  *                               Process 24bit samples natively.
  209  * SND_FEEDER_FULL_MULTIFORMAT - Ditto, but process 8bit samples natively.
  210  */
  211 #ifdef SND_FEEDER_FULL_MULTIFORMAT
  212 #undef SND_FEEDER_MULTIFORMAT
  213 #define SND_FEEDER_MULTIFORMAT  1
  214 #endif

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