sys/dev/sound/pcm/fake.c

   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/fake.c,v 1.14.2.1 2005/12/30 19:55:54 netchild Exp $
  27  * $DragonFly: src/sys/dev/sound/pcm/fake.c,v 1.5 2007/01/04 21:47:03 corecode Exp $
  28  */
  29
  30 #include <dev/sound/pcm/sound.h>
  31
  32
  33 static u_int32_t fk_fmt[] = {
  34         AFMT_MU_LAW,
  35         AFMT_STEREO | AFMT_MU_LAW,
  36         AFMT_A_LAW,
  37         AFMT_STEREO | AFMT_A_LAW,
  38         AFMT_U8,
  39         AFMT_STEREO | AFMT_U8,
  40         AFMT_S8,
  41         AFMT_STEREO | AFMT_S8,
  42         AFMT_S16_LE,
  43         AFMT_STEREO | AFMT_S16_LE,
  44         AFMT_U16_LE,
  45         AFMT_STEREO | AFMT_U16_LE,
  46         AFMT_S16_BE,
  47         AFMT_STEREO | AFMT_S16_BE,
  48         AFMT_U16_BE,
  49         AFMT_STEREO | AFMT_U16_BE,
  50         AFMT_S24_LE,
  51         AFMT_STEREO | AFMT_S24_LE,
  52         AFMT_U24_LE,
  53         AFMT_STEREO | AFMT_U24_LE,
  54         AFMT_S24_BE,
  55         AFMT_STEREO | AFMT_S24_BE,
  56         AFMT_U24_BE,
  57         AFMT_STEREO | AFMT_U24_BE,
  58         AFMT_S32_LE,
  59         AFMT_STEREO | AFMT_S32_LE,
  60         AFMT_U32_LE,
  61         AFMT_STEREO | AFMT_U32_LE,
  62         AFMT_S32_BE,
  63         AFMT_STEREO | AFMT_S32_BE,
  64         AFMT_U32_BE,
  65         AFMT_STEREO | AFMT_U32_BE,
  66         0
  67 };
  68 static struct pcmchan_caps fk_caps = {0, 1000000, fk_fmt, 0};
  69
  70 #define FKBUFSZ 4096
  71 static char fakebuf[FKBUFSZ];
  72
  73 /* channel interface */
  74 static void *
  75 fkchan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
  76 {
  77         sndbuf_setup(b, fakebuf, FKBUFSZ);
  78         return (void *)0xbabef00d;
  79 }
  80
  81 static int
  82 fkchan_free(kobj_t obj, void *data)
  83 {
  84         return 0;
  85 }
  86
  87 static int
  88 fkchan_setformat(kobj_t obj, void *data, u_int32_t format)
  89 {
  90         return 0;
  91 }
  92
  93 static int
  94 fkchan_setspeed(kobj_t obj, void *data, u_int32_t speed)
  95 {
  96         return speed;
  97 }
  98
  99 static int
 100 fkchan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
 101 {
 102         return blocksize;
 103 }
 104
 105 static int
 106 fkchan_trigger(kobj_t obj, void *data, int go)
 107 {
 108         return 0;
 109 }
 110
 111 static int
 112 fkchan_getptr(kobj_t obj, void *data)
 113 {
 114         return 0;
 115 }
 116
 117 static struct pcmchan_caps *
 118 fkchan_getcaps(kobj_t obj, void *data)
 119 {
 120         return &fk_caps;
 121 }
 122
 123 static kobj_method_t fkchan_methods[] = {
 124         KOBJMETHOD(channel_init,                fkchan_init),
 125         KOBJMETHOD(channel_free,                fkchan_free),
 126         KOBJMETHOD(channel_setformat,           fkchan_setformat),
 127         KOBJMETHOD(channel_setspeed,            fkchan_setspeed),
 128         KOBJMETHOD(channel_setblocksize,        fkchan_setblocksize),
 129         KOBJMETHOD(channel_trigger,             fkchan_trigger),
 130         KOBJMETHOD(channel_getptr,              fkchan_getptr),
 131         KOBJMETHOD(channel_getcaps,             fkchan_getcaps),
 132         { 0, 0 }
 133 };
 134 CHANNEL_DECLARE(fkchan);
 135
 136 struct pcm_channel *
 137 fkchan_setup(device_t dev)
 138 {
 139         struct snddev_info *d = device_get_softc(dev);
 140         struct pcm_channel *c;
 141
 142         c = kmalloc(sizeof(*c), M_DEVBUF, M_WAITOK);
 143         c->methods = kobj_create(&fkchan_class, M_DEVBUF, M_WAITOK);
 144         c->parentsnddev = d;
 145         /*
 146          * Fake channel is such a blessing in disguise. Using this,
 147          * we can keep track prefered virtual channel speed without
 148          * querying kernel hint repetitively (see vchan_create / vchan.c).
 149          */
 150         c->speed = 0;
 151         ksnprintf(c->name, CHN_NAMELEN, "%s:fake", device_get_nameunit(dev));
 152
 153         return c;
 154 }
 155
 156 int
 157 fkchan_kill(struct pcm_channel *c)
 158 {
 159         kobj_delete(c->methods, M_DEVBUF);
 160         c->methods = NULL;
 161         kfree(c, M_DEVBUF);
 162         return 0;
 163 }
 164
 165