126 lines
3.6 KiB
C
126 lines
3.6 KiB
C
/* $NetBSD: padvol.c,v 1.6 2011/11/23 23:07:33 jmcneill Exp $ */
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/*-
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* Copyright (c) 2007 Jared D. McNeill <jmcneill@invisible.ca>
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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/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: padvol.c,v 1.6 2011/11/23 23:07:33 jmcneill Exp $");
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/select.h>
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#include <sys/condvar.h>
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#include <sys/kmem.h>
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#include <sys/device.h>
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#include <sys/endian.h>
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#include <dev/audiovar.h>
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#include <dev/auconv.h>
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#include <dev/pad/padvar.h>
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#include <dev/pad/padvol.h>
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typedef struct pad_filter {
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stream_filter_t base;
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struct audio_softc *audiosc;
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} pad_filter_t;
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static void
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pad_filter_dtor(stream_filter_t *this)
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{
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if (this)
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kmem_free(this, sizeof(pad_filter_t));
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}
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static stream_filter_t *
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pad_filter_factory(struct audio_softc *sc,
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int (*fetch_to)(struct audio_softc *, stream_fetcher_t *,
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audio_stream_t *, int))
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{
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pad_filter_t *this;
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this = kmem_alloc(sizeof(pad_filter_t), KM_SLEEP);
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this->base.base.fetch_to = fetch_to;
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this->base.dtor = pad_filter_dtor;
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this->base.set_fetcher = stream_filter_set_fetcher;
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this->base.set_inputbuffer = stream_filter_set_inputbuffer;
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this->audiosc = sc;
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return (stream_filter_t *)this;
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}
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PAD_DEFINE_FILTER(pad_vol_slinear16_le)
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{
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pad_filter_t *pf;
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pad_softc_t *sc;
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stream_filter_t *this;
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int16_t j, *wp;
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int m, err;
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pf = (pad_filter_t *)self;
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sc = device_private(pf->audiosc->sc_dev);
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this = &pf->base;
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max_used = (max_used + 1) & ~1;
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if ((err = this->prev->fetch_to(asc, this->prev, this->src, max_used)))
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return err;
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m = (dst->end - dst->start) & ~1;
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m = min(m, max_used);
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FILTER_LOOP_PROLOGUE(this->src, 2, dst, 2, m) {
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j = le16dec(s);
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wp = (int16_t *)d;
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le16enc(wp, (j * sc->sc_swvol) / 255);
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} FILTER_LOOP_EPILOGUE(this->src, dst);
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return 0;
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}
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PAD_DEFINE_FILTER(pad_vol_slinear16_be)
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{
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pad_filter_t *pf;
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pad_softc_t *sc;
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stream_filter_t *this;
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int16_t j, *wp;
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int m, err;
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pf = (pad_filter_t *)self;
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sc = device_private(pf->audiosc->sc_dev);
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this = &pf->base;
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max_used = (max_used + 1) & ~1;
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if ((err = this->prev->fetch_to(asc, this->prev, this->src, max_used)))
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return err;
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m = (dst->end - dst->start) & ~1;
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m = min(m, max_used);
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FILTER_LOOP_PROLOGUE(this->src, 2, dst, 2, m) {
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j = be16dec(s);
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wp = (int16_t *)d;
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be16enc(wp, (j * sc->sc_swvol) / 255);
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} FILTER_LOOP_EPILOGUE(this->src, dst);
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return 0;
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}
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