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oss_caps.c revision 1.1 
      1  1.1  nia /*	$NetBSD: oss_caps.c,v 1.1 2021/06/08 18:43:54 nia Exp $	*/
      2  1.1  nia 
      3  1.1  nia /*-
      4  1.1  nia  * Copyright (c) 2021 The NetBSD Foundation, Inc.
      5  1.1  nia  * All rights reserved.
      6  1.1  nia  *
      7  1.1  nia  * This code is derived from software contributed to The NetBSD Foundation
      8  1.1  nia  * by Nia Alarie.
      9  1.1  nia  *
     10  1.1  nia  * Redistribution and use in source and binary forms, with or without
     11  1.1  nia  * modification, are permitted provided that the following conditions
     12  1.1  nia  * are met:
     13  1.1  nia  * 1. Redistributions of source code must retain the above copyright
     14  1.1  nia  *    notice, this list of conditions and the following disclaimer.
     15  1.1  nia  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.1  nia  *    notice, this list of conditions and the following disclaimer in the
     17  1.1  nia  *    documentation and/or other materials provided with the distribution.
     18  1.1  nia  *
     19  1.1  nia  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  1.1  nia  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  1.1  nia  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  1.1  nia  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  1.1  nia  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  1.1  nia  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  1.1  nia  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  1.1  nia  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  1.1  nia  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  1.1  nia  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  1.1  nia  * POSSIBILITY OF SUCH DAMAGE.
     30  1.1  nia  */
     31  1.1  nia #include <sys/audioio.h>
     32  1.1  nia #include "internal.h"
     33  1.1  nia 
     34  1.1  nia oss_private int
     35  1.1  nia _oss_get_caps(int fd, int *out)
     36  1.1  nia {
     37  1.1  nia 	struct audio_info info;
     38  1.1  nia 	int props, caps;
     39  1.1  nia 	int nchannels;
     40  1.1  nia 
     41  1.1  nia 	if (ioctl(fd, AUDIO_GETPROPS, &props) < 0)
     42  1.1  nia 		return -1;
     43  1.1  nia 
     44  1.1  nia 	if (ioctl(fd, AUDIO_GETFORMAT, &info) < 0)
     45  1.1  nia 		return -1;
     46  1.1  nia 
     47  1.1  nia 	caps = 0;
     48  1.1  nia 	caps |= PCM_CAP_TRIGGER;
     49  1.1  nia 	caps |= PCM_CAP_MULTI;
     50  1.1  nia 	caps |= PCM_CAP_FREERATE;
     51  1.1  nia 
     52  1.1  nia 	nchannels = (props & AUDIO_PROP_PLAYBACK) ?
     53  1.1  nia 	    info.play.channels : info.record.channels;
     54  1.1  nia 
     55  1.1  nia 	switch (nchannels) {
     56  1.1  nia 	case 2:
     57  1.1  nia 		caps |= DSP_CH_STEREO;
     58  1.1  nia 		break;
     59  1.1  nia 	case 1:
     60  1.1  nia 		caps |= DSP_CH_MONO;
     61  1.1  nia 		break;
     62  1.1  nia 	default:
     63  1.1  nia 		caps |= DSP_CH_MULTI;
     64  1.1  nia 		break;
     65  1.1  nia 	}
     66  1.1  nia 
     67  1.1  nia 	if (props & AUDIO_PROP_FULLDUPLEX)
     68  1.1  nia 		caps |= PCM_CAP_DUPLEX;
     69  1.1  nia 	if (props & AUDIO_PROP_MMAP)
     70  1.1  nia 		caps |= PCM_CAP_MMAP;
     71  1.1  nia 	if (props & AUDIO_PROP_CAPTURE)
     72  1.1  nia 		caps |= PCM_CAP_INPUT;
     73  1.1  nia 	if (props & AUDIO_PROP_PLAYBACK)
     74  1.1  nia 		caps |= PCM_CAP_OUTPUT;
     75  1.1  nia 
     76  1.1  nia 	*out = caps;
     77  1.1  nia 	return 0;
     78  1.1  nia }
     79