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  * 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 

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