aiomixer(1): Fix setting volume on sb(4) emulated in QEMU.
The driver does not return a "delta", assume it's 16.
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@ -1,4 +1,4 @@
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/* $NetBSD: main.c,v 1.5 2023/06/29 19:06:54 nia Exp $ */
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/* $NetBSD: main.c,v 1.6 2024/05/20 22:21:45 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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@ -149,7 +149,12 @@ slide_control(struct aiomixer *aio,
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switch (info->type) {
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case AUDIO_MIXER_VALUE:
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delta = right ? info->un.v.delta : -info->un.v.delta;
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if (info->un.v.delta != 0) {
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delta = right ? info->un.v.delta : -info->un.v.delta;
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} else {
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/* delta is 0 in qemu with sb(4) */
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delta = right ? 16 : -16;
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}
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/*
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* work around strange problem where the level can be
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* increased but not decreased, seen with uaudio(4)
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