78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
/* $NetBSD: oss_caps.c,v 1.2 2021/06/09 14:49:13 nia Exp $ */
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/*-
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* Copyright (c) 2021 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Nia Alarie.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/audioio.h>
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#include "internal.h"
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oss_private int
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_oss_get_caps(int fd, int *out)
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{
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struct audio_info info;
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int props, caps;
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int nchannels;
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if (ioctl(fd, AUDIO_GETPROPS, &props) < 0)
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return -1;
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caps = 0;
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caps |= PCM_CAP_TRIGGER;
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caps |= PCM_CAP_MULTI;
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caps |= PCM_CAP_FREERATE;
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if (ioctl(fd, AUDIO_GETFORMAT, &info) != -1) {
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nchannels = (props & AUDIO_PROP_PLAYBACK) ?
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info.play.channels : info.record.channels;
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switch (nchannels) {
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case 2:
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caps |= DSP_CH_STEREO;
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break;
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case 1:
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caps |= DSP_CH_MONO;
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break;
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default:
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caps |= DSP_CH_MULTI;
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break;
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}
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}
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if (props & AUDIO_PROP_FULLDUPLEX)
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caps |= PCM_CAP_DUPLEX;
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if (props & AUDIO_PROP_MMAP)
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caps |= PCM_CAP_MMAP;
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if (props & AUDIO_PROP_CAPTURE)
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caps |= PCM_CAP_INPUT;
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if (props & AUDIO_PROP_PLAYBACK)
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caps |= PCM_CAP_OUTPUT;
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*out = caps;
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return 0;
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}
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