text: /*-
   * Copyright (c) 1999 Cameron Grant <cg@freebsd.org>
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   * $FreeBSD: src/sys/dev/sound/pcm/fake.c,v 1.14.2.1 2005/12/30 19:55:54 netchild Exp $
   */
  
  #include <dev/sound/pcm/sound.h>
  
  
  static u_int32_t fk_fmt[] = {
  	AFMT_MU_LAW,
  	AFMT_STEREO | AFMT_MU_LAW,
  	AFMT_A_LAW,
  	AFMT_STEREO | AFMT_A_LAW,
  	AFMT_U8,
  	AFMT_STEREO | AFMT_U8,
  	AFMT_S8,
  	AFMT_STEREO | AFMT_S8,
  	AFMT_S16_LE,
  	AFMT_STEREO | AFMT_S16_LE,
  	AFMT_U16_LE,
  	AFMT_STEREO | AFMT_U16_LE,
  	AFMT_S16_BE,
  	AFMT_STEREO | AFMT_S16_BE,
  	AFMT_U16_BE,
  	AFMT_STEREO | AFMT_U16_BE,
  	AFMT_S24_LE,
  	AFMT_STEREO | AFMT_S24_LE,
  	AFMT_U24_LE,
  	AFMT_STEREO | AFMT_U24_LE,
  	AFMT_S24_BE,
  	AFMT_STEREO | AFMT_S24_BE,
  	AFMT_U24_BE,
  	AFMT_STEREO | AFMT_U24_BE,
  	AFMT_S32_LE,
  	AFMT_STEREO | AFMT_S32_LE,
  	AFMT_U32_LE,
  	AFMT_STEREO | AFMT_U32_LE,
  	AFMT_S32_BE,
  	AFMT_STEREO | AFMT_S32_BE,
  	AFMT_U32_BE,
  	AFMT_STEREO | AFMT_U32_BE,
  	0
  };
  static struct pcmchan_caps fk_caps = {0, 1000000, fk_fmt, 0};
  
  #define	FKBUFSZ	4096
  static char fakebuf[FKBUFSZ];
  
  /* channel interface */
  static void *
  fkchan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
  {
  	sndbuf_setup(b, fakebuf, FKBUFSZ);
  	return (void *)0xbabef00d;
  }
  
  static int
  fkchan_free(kobj_t obj, void *data)
  {
  	return 0;
  }
  
  static int
  fkchan_setformat(kobj_t obj, void *data, u_int32_t format)
  {
  	return 0;
  }
  
  static int
  fkchan_setspeed(kobj_t obj, void *data, u_int32_t speed)
  {
  	return speed;
  }
  
  static int
  fkchan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
  {
  	return blocksize;
  }
  
  static int
  fkchan_trigger(kobj_t obj, void *data, int go)
  {
  	return 0;
  }
  
  static int
  fkchan_getptr(kobj_t obj, void *data)
  {
  	return 0;
  }
  
  static struct pcmchan_caps *
  fkchan_getcaps(kobj_t obj, void *data)
  {
  	return &fk_caps;
  }
  
  static kobj_method_t fkchan_methods[] = {
      	KOBJMETHOD(channel_init,		fkchan_init),
      	KOBJMETHOD(channel_free,		fkchan_free),
      	KOBJMETHOD(channel_setformat,		fkchan_setformat),
      	KOBJMETHOD(channel_setspeed,		fkchan_setspeed),
      	KOBJMETHOD(channel_setblocksize,	fkchan_setblocksize),
      	KOBJMETHOD(channel_trigger,		fkchan_trigger),
      	KOBJMETHOD(channel_getptr,		fkchan_getptr),
      	KOBJMETHOD(channel_getcaps,		fkchan_getcaps),
  	KOBJMETHOD_END
  };
  CHANNEL_DECLARE(fkchan);
  
  struct pcm_channel *
  fkchan_setup(device_t dev)
  {
      	struct snddev_info *d = device_get_softc(dev);
  	struct pcm_channel *c;
  
  	c = kmalloc(sizeof(*c), M_DEVBUF, M_WAITOK);
  	c->methods = kobj_create(&fkchan_class, M_DEVBUF, M_WAITOK);
  	c->parentsnddev = d;
  	/*
  	 * Fake channel is such a blessing in disguise. Using this,
  	 * we can keep track prefered virtual channel speed without
  	 * querying kernel hint repetitively (see vchan_create / vchan.c).
  	 */
  	c->speed = 0;
  	ksnprintf(c->name, CHN_NAMELEN, "%s:fake", device_get_nameunit(dev));
  
  	return c;
  }
  
  int
  fkchan_kill(struct pcm_channel *c)
  {
  	kobj_delete(c->methods, M_DEVBUF);
  	c->methods = NULL;
  	kfree(c, M_DEVBUF);
  	return 0;
  }
  
  
  