sys/dev/mulaw.h

   1 /*      $NetBSD: mulaw.h,v 1.19 2005/12/11 12:20:53 christos Exp $      */
   2
   3 /*-
   4  * Copyright (c) 1996 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by John T. Kohl.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #ifndef _SYS_DEV_MULAW_H_
  33 #define _SYS_DEV_MULAW_H_
  34 #include <dev/audio_if.h>
  35
  36 /* Convert 8-bit mu-law to/from 16 bit unsigned/signed linear. */
  37 extern stream_filter_factory_t mulaw_to_linear16;
  38 extern stream_filter_factory_t linear16_to_mulaw;
  39 /* Convert 8-bit mu-law to/from 8 bit unsigned/signed linear. */
  40 extern stream_filter_factory_t mulaw_to_linear8;
  41 extern stream_filter_factory_t linear8_to_mulaw;
  42 /* Convert 8-bit A-law to/from 16 bit unsigned/signed linear. */
  43 extern stream_filter_factory_t alaw_to_linear16;
  44 extern stream_filter_factory_t linear16_to_alaw;
  45 /* Convert 8-bit A-law to/from 8 bit unsigned/signed linear. */
  46 extern stream_filter_factory_t alaw_to_linear8;
  47 extern stream_filter_factory_t linear8_to_alaw;
  48
  49 #endif /* _SYS_DEV_MULAW_H_ */