sys/dev/sound/pcm/feeder.h

   1 /*-
   2  * Copyright (c) 1999 Cameron Grant <cg@freebsd.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/sys/dev/sound/pcm/feeder.h,v 1.12.2.1 2006/01/29 02:27:28 ariff Exp $
  27  * $DragonFly: src/sys/dev/sound/pcm/feeder.h,v 1.3 2007/01/04 21:47:03 corecode Exp $
  28  */
  29
  30 struct pcm_feederdesc {
  31         u_int32_t type;
  32         u_int32_t in, out;
  33         u_int32_t flags;
  34         int idx;
  35 };
  36
  37 struct feeder_class {
  38         KOBJ_CLASS_FIELDS;
  39         int align;
  40         struct pcm_feederdesc *desc;
  41         void *data;
  42 };
  43
  44 struct pcm_feeder {
  45         KOBJ_FIELDS;
  46         int align;
  47         struct pcm_feederdesc *desc, desc_static;
  48         void *data;
  49         struct feeder_class *class;
  50         struct pcm_feeder *source, *parent;
  51
  52 };
  53
  54 void feeder_register(void *p);
  55 struct feeder_class *feeder_getclass(struct pcm_feederdesc *desc);
  56
  57 int chn_fmtscore(u_int32_t fmt);
  58 u_int32_t chn_fmtbestbit(u_int32_t fmt, u_int32_t *fmts);
  59 u_int32_t chn_fmtbeststereo(u_int32_t fmt, u_int32_t *fmts);
  60 u_int32_t chn_fmtbest(u_int32_t fmt, u_int32_t *fmts);
  61 u_int32_t chn_fmtchain(struct pcm_channel *c, u_int32_t *to);
  62 int chn_addfeeder(struct pcm_channel *c, struct feeder_class *fc, struct pcm_feederdesc *desc);
  63 int chn_removefeeder(struct pcm_channel *c);
  64 struct pcm_feeder *chn_findfeeder(struct pcm_channel *c, u_int32_t type);
  65 void feeder_printchain(struct pcm_feeder *head);
  66
  67 #define FEEDER_DECLARE(feeder, palign, pdata) \
  68 static struct feeder_class feeder ## _class = { \
  69         .name =         #feeder, \
  70         .methods =      feeder ## _methods, \
  71         .size =         sizeof(struct pcm_feeder), \
  72         .align =        palign, \
  73         .desc =         feeder ## _desc, \
  74         .data =         pdata, \
  75 }; \
  76 SYSINIT(feeder, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, feeder_register, &feeder ## _class);
  77
  78 #define FEEDER_ROOT     1
  79 #define FEEDER_FMT      2
  80 #define FEEDER_MIXER    3
  81 #define FEEDER_RATE     4
  82 #define FEEDER_FILTER   5
  83 #define FEEDER_VOLUME   6
  84 #define FEEDER_LAST     FEEDER_VOLUME
  85
  86 #define FEEDRATE_SRC    1
  87 #define FEEDRATE_DST    2
  88
  89