/*      $NetBSD: oss_caps.c,v 1.2 2021/06/09 14:49:13 nia Exp $ */

/*-
* Copyright (c) 2021 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Nia Alarie.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#include <sys/audioio.h>
#include "internal.h"

oss_private int
_oss_get_caps(int fd, int *out)
{
       struct audio_info info;
       int props, caps;
       int nchannels;

       if (ioctl(fd, AUDIO_GETPROPS, &props) < 0)
               return -1;

       caps = 0;
       caps |= PCM_CAP_TRIGGER;
       caps |= PCM_CAP_MULTI;
       caps |= PCM_CAP_FREERATE;

       if (ioctl(fd, AUDIO_GETFORMAT, &info) != -1) {
               nchannels = (props & AUDIO_PROP_PLAYBACK) ?
                   info.play.channels : info.record.channels;

               switch (nchannels) {
               case 2:
                       caps |= DSP_CH_STEREO;
                       break;
               case 1:
                       caps |= DSP_CH_MONO;
                       break;
               default:
                       caps |= DSP_CH_MULTI;
                       break;
               }
       }

       if (props & AUDIO_PROP_FULLDUPLEX)
               caps |= PCM_CAP_DUPLEX;
       if (props & AUDIO_PROP_MMAP)
               caps |= PCM_CAP_MMAP;
       if (props & AUDIO_PROP_CAPTURE)
               caps |= PCM_CAP_INPUT;
       if (props & AUDIO_PROP_PLAYBACK)
               caps |= PCM_CAP_OUTPUT;

       *out = caps;
       return 0;
}