394 lines
10 KiB
C
394 lines
10 KiB
C
/* $NetBSD: oss3_mixer.c,v 1.1 2021/06/08 18:43:54 nia Exp $ */
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/*-
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* Copyright (c) 1997-2021 The NetBSD Foundation, Inc.
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* All rights reserved.
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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 <sys/stat.h>
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#include <errno.h>
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#include "internal.h"
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/* If the NetBSD mixer device should have more than NETBSD_MAXDEVS devices
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* some will not be available to OSS applications */
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#define NETBSD_MAXDEVS 64
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struct audiodevinfo {
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int done;
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dev_t dev;
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int16_t devmap[SOUND_MIXER_NRDEVICES],
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rdevmap[NETBSD_MAXDEVS];
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char names[NETBSD_MAXDEVS][MAX_AUDIO_DEV_LEN];
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int enum2opaque[NETBSD_MAXDEVS];
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u_long devmask, recmask, stereomask;
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u_long caps;
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int source;
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};
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static struct audiodevinfo *getdevinfo(int);
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static int opaque_to_enum(struct audiodevinfo *, audio_mixer_name_t *, int);
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static int enum_to_ord(struct audiodevinfo *, int);
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static int enum_to_mask(struct audiodevinfo *, int);
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oss_private int
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_oss3_mixer_ioctl(int fd, unsigned long com, void *argp)
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{
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struct audiodevinfo *di;
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struct mixer_info *omi;
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struct audio_device adev;
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mixer_ctrl_t mc;
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u_long idat, n;
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int i;
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int retval;
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int l, r, error, e;
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idat = 0;
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di = getdevinfo(fd);
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if (di == 0)
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return -1;
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switch (com) {
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case OSS_GETVERSION:
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idat = SOUND_VERSION;
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break;
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case SOUND_MIXER_INFO:
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case SOUND_OLD_MIXER_INFO:
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error = ioctl(fd, AUDIO_GETDEV, &adev);
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if (error)
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return (error);
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omi = argp;
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if (com == SOUND_MIXER_INFO)
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omi->modify_counter = 1;
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strlcpy(omi->id, adev.name, sizeof omi->id);
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strlcpy(omi->name, adev.name, sizeof omi->name);
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return 0;
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case SOUND_MIXER_READ_RECSRC:
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if (di->source == -1) {
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errno = EINVAL;
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return -1;
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}
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mc.dev = di->source;
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if (di->caps & SOUND_CAP_EXCL_INPUT) {
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mc.type = AUDIO_MIXER_ENUM;
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retval = ioctl(fd, AUDIO_MIXER_READ, &mc);
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if (retval < 0)
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return retval;
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e = opaque_to_enum(di, NULL, mc.un.ord);
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if (e >= 0)
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idat = 1 << di->rdevmap[e];
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} else {
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mc.type = AUDIO_MIXER_SET;
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retval = ioctl(fd, AUDIO_MIXER_READ, &mc);
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if (retval < 0)
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return retval;
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e = opaque_to_enum(di, NULL, mc.un.mask);
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if (e >= 0)
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idat = 1 << di->rdevmap[e];
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}
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break;
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case SOUND_MIXER_READ_DEVMASK:
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idat = di->devmask;
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break;
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case SOUND_MIXER_READ_RECMASK:
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idat = di->recmask;
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break;
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case SOUND_MIXER_READ_STEREODEVS:
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idat = di->stereomask;
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break;
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case SOUND_MIXER_READ_CAPS:
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idat = di->caps;
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break;
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case SOUND_MIXER_WRITE_RECSRC:
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case SOUND_MIXER_WRITE_R_RECSRC:
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if (di->source == -1) {
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errno = EINVAL;
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return -1;
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}
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mc.dev = di->source;
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idat = INTARG;
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if (di->caps & SOUND_CAP_EXCL_INPUT) {
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mc.type = AUDIO_MIXER_ENUM;
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for(i = 0; i < SOUND_MIXER_NRDEVICES; i++)
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if (idat & (1 << i))
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break;
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if (i >= SOUND_MIXER_NRDEVICES ||
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di->devmap[i] == -1) {
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errno = EINVAL;
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return -1;
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}
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mc.un.ord = enum_to_ord(di, di->devmap[i]);
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} else {
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mc.type = AUDIO_MIXER_SET;
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mc.un.mask = 0;
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for(i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
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if (idat & (1 << i)) {
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if (di->devmap[i] == -1) {
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errno = EINVAL;
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return -1;
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}
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mc.un.mask |=
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enum_to_mask(di, di->devmap[i]);
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}
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}
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}
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return ioctl(fd, AUDIO_MIXER_WRITE, &mc);
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default:
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if (MIXER_READ(SOUND_MIXER_FIRST) <= com &&
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com < MIXER_READ(SOUND_MIXER_NRDEVICES)) {
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n = GET_DEV(com);
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if (di->devmap[n] == -1) {
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errno = EINVAL;
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return -1;
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}
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mc.dev = di->devmap[n];
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mc.type = AUDIO_MIXER_VALUE;
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doread:
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mc.un.value.num_channels =
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di->stereomask & (1 << (u_int)n) ? 2 : 1;
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retval = ioctl(fd, AUDIO_MIXER_READ, &mc);
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if (retval < 0)
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return retval;
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if (mc.type != AUDIO_MIXER_VALUE) {
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errno = EINVAL;
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return -1;
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}
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if (mc.un.value.num_channels != 2) {
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l = r =
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mc.un.value.level[AUDIO_MIXER_LEVEL_MONO];
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} else {
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l = mc.un.value.level[AUDIO_MIXER_LEVEL_LEFT];
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r = mc.un.value.level[AUDIO_MIXER_LEVEL_RIGHT];
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}
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idat = TO_OSSVOL(l) | (TO_OSSVOL(r) << 8);
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break;
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} else if ((MIXER_WRITE_R(SOUND_MIXER_FIRST) <= com &&
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com < MIXER_WRITE_R(SOUND_MIXER_NRDEVICES)) ||
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(MIXER_WRITE(SOUND_MIXER_FIRST) <= com &&
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com < MIXER_WRITE(SOUND_MIXER_NRDEVICES))) {
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n = GET_DEV(com);
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if (di->devmap[n] == -1) {
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errno = EINVAL;
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return -1;
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}
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idat = INTARG;
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l = FROM_OSSVOL((u_int)idat & 0xff);
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r = FROM_OSSVOL(((u_int)idat >> 8) & 0xff);
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mc.dev = di->devmap[n];
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mc.type = AUDIO_MIXER_VALUE;
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if (di->stereomask & (1 << (u_int)n)) {
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mc.un.value.num_channels = 2;
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mc.un.value.level[AUDIO_MIXER_LEVEL_LEFT] = l;
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mc.un.value.level[AUDIO_MIXER_LEVEL_RIGHT] = r;
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} else {
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mc.un.value.num_channels = 1;
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mc.un.value.level[AUDIO_MIXER_LEVEL_MONO] =
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(l + r) / 2;
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}
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retval = ioctl(fd, AUDIO_MIXER_WRITE, &mc);
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if (retval < 0)
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return retval;
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if (MIXER_WRITE(SOUND_MIXER_FIRST) <= com &&
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com < MIXER_WRITE(SOUND_MIXER_NRDEVICES))
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return 0;
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goto doread;
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} else {
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errno = EINVAL;
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return -1;
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}
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}
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INTARG = (int)idat;
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return 0;
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}
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/*
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* Collect the audio device information to allow faster
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* emulation of the OSSv3 mixer ioctls. Cache the information
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* to eliminate the overhead of repeating all the ioctls needed
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* to collect the information.
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*/
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static struct audiodevinfo *
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getdevinfo(int fd)
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{
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mixer_devinfo_t mi;
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int i, j, e;
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static struct {
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const char *name;
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int code;
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} *dp, devs[] = {
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{ AudioNmicrophone, SOUND_MIXER_MIC },
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{ AudioNline, SOUND_MIXER_LINE },
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{ AudioNcd, SOUND_MIXER_CD },
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{ AudioNdac, SOUND_MIXER_PCM },
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{ AudioNaux, SOUND_MIXER_LINE1 },
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{ AudioNrecord, SOUND_MIXER_IMIX },
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{ AudioNmaster, SOUND_MIXER_VOLUME },
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{ AudioNtreble, SOUND_MIXER_TREBLE },
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{ AudioNbass, SOUND_MIXER_BASS },
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{ AudioNspeaker, SOUND_MIXER_SPEAKER },
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/* { AudioNheadphone, ?? },*/
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{ AudioNoutput, SOUND_MIXER_OGAIN },
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{ AudioNinput, SOUND_MIXER_IGAIN },
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/* { AudioNmaster, SOUND_MIXER_SPEAKER },*/
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/* { AudioNstereo, ?? },*/
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/* { AudioNmono, ?? },*/
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{ AudioNfmsynth, SOUND_MIXER_SYNTH },
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/* { AudioNwave, SOUND_MIXER_PCM },*/
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{ AudioNmidi, SOUND_MIXER_SYNTH },
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/* { AudioNmixerout, ?? },*/
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{ 0, -1 }
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};
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static struct audiodevinfo devcache = { .done = 0 };
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struct audiodevinfo *di = &devcache;
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struct stat sb;
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size_t mlen, dlen;
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/* Figure out what device it is so we can check if the
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* cached data is valid.
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*/
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if (fstat(fd, &sb) < 0)
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return 0;
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if (di->done && di->dev == sb.st_dev)
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return di;
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di->done = 1;
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di->dev = sb.st_dev;
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di->devmask = 0;
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di->recmask = 0;
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di->stereomask = 0;
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di->source = ~0;
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di->caps = 0;
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for(i = 0; i < SOUND_MIXER_NRDEVICES; i++)
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di->devmap[i] = -1;
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for(i = 0; i < NETBSD_MAXDEVS; i++) {
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di->rdevmap[i] = -1;
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di->names[i][0] = '\0';
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di->enum2opaque[i] = -1;
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}
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for(i = 0; i < NETBSD_MAXDEVS; i++) {
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mi.index = i;
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if (ioctl(fd, AUDIO_MIXER_DEVINFO, &mi) < 0)
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break;
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switch(mi.type) {
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case AUDIO_MIXER_VALUE:
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for(dp = devs; dp->name; dp++) {
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if (strcmp(dp->name, mi.label.name) == 0)
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break;
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dlen = strlen(dp->name);
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mlen = strlen(mi.label.name);
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if (dlen < mlen
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&& mi.label.name[mlen-dlen-1] == '.'
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&& strcmp(dp->name,
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mi.label.name + mlen - dlen) == 0)
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break;
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}
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if (dp->code >= 0) {
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di->devmap[dp->code] = i;
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di->rdevmap[i] = dp->code;
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di->devmask |= 1 << dp->code;
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if (mi.un.v.num_channels == 2)
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di->stereomask |= 1 << dp->code;
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strlcpy(di->names[i], mi.label.name,
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sizeof di->names[i]);
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}
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break;
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}
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}
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for(i = 0; i < NETBSD_MAXDEVS; i++) {
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mi.index = i;
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if (ioctl(fd, AUDIO_MIXER_DEVINFO, &mi) < 0)
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break;
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if (strcmp(mi.label.name, AudioNsource) != 0)
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continue;
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di->source = i;
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switch(mi.type) {
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case AUDIO_MIXER_ENUM:
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for(j = 0; j < mi.un.e.num_mem; j++) {
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e = opaque_to_enum(di,
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&mi.un.e.member[j].label,
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mi.un.e.member[j].ord);
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if (e >= 0)
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di->recmask |= 1 << di->rdevmap[e];
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}
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di->caps = SOUND_CAP_EXCL_INPUT;
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break;
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case AUDIO_MIXER_SET:
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for(j = 0; j < mi.un.s.num_mem; j++) {
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e = opaque_to_enum(di,
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&mi.un.s.member[j].label,
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mi.un.s.member[j].mask);
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if (e >= 0)
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di->recmask |= 1 << di->rdevmap[e];
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}
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break;
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}
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}
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return di;
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}
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static int
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opaque_to_enum(struct audiodevinfo *di, audio_mixer_name_t *label, int opq)
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{
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int i, o;
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for (i = 0; i < NETBSD_MAXDEVS; i++) {
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o = di->enum2opaque[i];
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if (o == opq)
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break;
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if (o == -1 && label != NULL &&
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!strncmp(di->names[i], label->name, sizeof di->names[i])) {
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di->enum2opaque[i] = opq;
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break;
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}
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}
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if (i >= NETBSD_MAXDEVS)
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i = -1;
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/*printf("opq_to_enum %s %d -> %d\n", label->name, opq, i);*/
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return (i);
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}
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static int
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enum_to_ord(struct audiodevinfo *di, int enm)
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{
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if (enm >= NETBSD_MAXDEVS)
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return (-1);
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/*printf("enum_to_ord %d -> %d\n", enm, di->enum2opaque[enm]);*/
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return (di->enum2opaque[enm]);
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}
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static int
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enum_to_mask(struct audiodevinfo *di, int enm)
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{
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int m;
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if (enm >= NETBSD_MAXDEVS)
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return (0);
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m = di->enum2opaque[enm];
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if (m == -1)
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m = 0;
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/*printf("enum_to_mask %d -> %d\n", enm, di->enum2opaque[enm]);*/
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return (m);
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}
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