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/fake.c

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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 
   27 #include <dev/sound/pcm/sound.h>
   28 
   29 SND_DECLARE_FILE("$FreeBSD: releng/5.2/sys/dev/sound/pcm/fake.c 119853 2003-09-07 16:28:03Z cg $");
   30 
   31 static u_int32_t fk_fmt[] = {
   32         AFMT_U8,
   33         AFMT_STEREO | AFMT_U8,
   34         AFMT_S8,
   35         AFMT_STEREO | AFMT_S8,
   36         AFMT_S16_LE,
   37         AFMT_STEREO | AFMT_S16_LE,
   38         AFMT_U16_LE,
   39         AFMT_STEREO | AFMT_U16_LE,
   40         AFMT_S16_BE,
   41         AFMT_STEREO | AFMT_S16_BE,
   42         AFMT_U16_BE,
   43         AFMT_STEREO | AFMT_U16_BE,
   44         0
   45 };
   46 static struct pcmchan_caps fk_caps = {0, 1000000, fk_fmt, 0};
   47 
   48 #define FKBUFSZ 4096
   49 static char fakebuf[FKBUFSZ];
   50 
   51 /* channel interface */
   52 static void *
   53 fkchan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
   54 {
   55         sndbuf_setup(b, fakebuf, FKBUFSZ);
   56         return (void *)0xbabef00d;
   57 }
   58 
   59 static int
   60 fkchan_free(kobj_t obj, void *data)
   61 {
   62         return 0;
   63 }
   64 
   65 static int
   66 fkchan_setformat(kobj_t obj, void *data, u_int32_t format)
   67 {
   68         return 0;
   69 }
   70 
   71 static int
   72 fkchan_setspeed(kobj_t obj, void *data, u_int32_t speed)
   73 {
   74         return speed;
   75 }
   76 
   77 static int
   78 fkchan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
   79 {
   80         return blocksize;
   81 }
   82 
   83 static int
   84 fkchan_trigger(kobj_t obj, void *data, int go)
   85 {
   86         return 0;
   87 }
   88 
   89 static int
   90 fkchan_getptr(kobj_t obj, void *data)
   91 {
   92         return 0;
   93 }
   94 
   95 static struct pcmchan_caps *
   96 fkchan_getcaps(kobj_t obj, void *data)
   97 {
   98         return &fk_caps;
   99 }
  100 
  101 static kobj_method_t fkchan_methods[] = {
  102         KOBJMETHOD(channel_init,                fkchan_init),
  103         KOBJMETHOD(channel_free,                fkchan_free),
  104         KOBJMETHOD(channel_setformat,           fkchan_setformat),
  105         KOBJMETHOD(channel_setspeed,            fkchan_setspeed),
  106         KOBJMETHOD(channel_setblocksize,        fkchan_setblocksize),
  107         KOBJMETHOD(channel_trigger,             fkchan_trigger),
  108         KOBJMETHOD(channel_getptr,              fkchan_getptr),
  109         KOBJMETHOD(channel_getcaps,             fkchan_getcaps),
  110         { 0, 0 }
  111 };
  112 CHANNEL_DECLARE(fkchan);
  113 
  114 struct pcm_channel *
  115 fkchan_setup(device_t dev)
  116 {
  117         struct snddev_info *d = device_get_softc(dev);
  118         struct pcm_channel *c;
  119 
  120         c = malloc(sizeof(*c), M_DEVBUF, M_WAITOK);
  121         c->methods = kobj_create(&fkchan_class, M_DEVBUF, M_WAITOK);
  122         c->parentsnddev = d;
  123         snprintf(c->name, CHN_NAMELEN, "%s:fake", device_get_nameunit(dev));
  124 
  125         return c;
  126 }
  127 
  128 int
  129 fkchan_kill(struct pcm_channel *c)
  130 {
  131         kobj_delete(c->methods, M_DEVBUF);
  132         c->methods = NULL;
  133         free(c, M_DEVBUF);
  134         return 0;
  135 }
  136 
  137 

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