| 1 | /* $NetBSD: auvolconv.c,v 1.3 2016/02/26 13:08:28 nat Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 2007 Jared D. McNeill <jmcneill@invisible.ca> |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 17 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 18 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 19 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 20 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 26 | * POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | #include <sys/cdefs.h> |
| 30 | __KERNEL_RCSID(0, "$NetBSD: auvolconv.c,v 1.3 2016/02/26 13:08:28 nat Exp $" ); |
| 31 | |
| 32 | #include <sys/types.h> |
| 33 | #include <sys/param.h> |
| 34 | #include <sys/select.h> |
| 35 | #include <sys/condvar.h> |
| 36 | #include <sys/kmem.h> |
| 37 | #include <sys/device.h> |
| 38 | #include <sys/endian.h> |
| 39 | |
| 40 | #include <dev/audiovar.h> |
| 41 | #include <dev/auconv.h> |
| 42 | #include <dev/auvolconv.h> |
| 43 | |
| 44 | int |
| 45 | auvolconv_slinear16_le_fetch_to(struct audio_softc *asc, |
| 46 | stream_fetcher_t *self, audio_stream_t *dst, int max_used) |
| 47 | { |
| 48 | auvolconv_filter_t *pf; |
| 49 | stream_filter_t *this; |
| 50 | int16_t j, *wp; |
| 51 | int m, err; |
| 52 | u_int vol; |
| 53 | |
| 54 | pf = (auvolconv_filter_t *)self; |
| 55 | this = &pf->base; |
| 56 | max_used = (max_used + 1) & ~1; |
| 57 | vol = *pf->vol; |
| 58 | |
| 59 | if ((err = this->prev->fetch_to(asc, this->prev, this->src, max_used))) |
| 60 | return err; |
| 61 | m = (dst->end - dst->start) & ~1; |
| 62 | m = min(m, max_used); |
| 63 | FILTER_LOOP_PROLOGUE(this->src, 2, dst, 2, m) { |
| 64 | j = le16dec(s); |
| 65 | wp = (int16_t *)d; |
| 66 | le16enc(wp, (int32_t)(j * vol) / 255); |
| 67 | } FILTER_LOOP_EPILOGUE(this->src, dst); |
| 68 | |
| 69 | return 0; |
| 70 | } |
| 71 | |
| 72 | int |
| 73 | auvolconv_slinear16_be_fetch_to(struct audio_softc *asc, |
| 74 | stream_fetcher_t *self, audio_stream_t *dst, int max_used) |
| 75 | { |
| 76 | auvolconv_filter_t *pf; |
| 77 | stream_filter_t *this; |
| 78 | int16_t j, *wp; |
| 79 | int m, err; |
| 80 | u_int vol; |
| 81 | |
| 82 | pf = (auvolconv_filter_t *)self; |
| 83 | this = &pf->base; |
| 84 | max_used = (max_used + 1) & ~1; |
| 85 | vol = *pf->vol; |
| 86 | |
| 87 | if ((err = this->prev->fetch_to(asc, this->prev, this->src, max_used))) |
| 88 | return err; |
| 89 | m = (dst->end - dst->start) & ~1; |
| 90 | m = min(m, max_used); |
| 91 | FILTER_LOOP_PROLOGUE(this->src, 2, dst, 2, m) { |
| 92 | j = be16dec(s); |
| 93 | wp = (int16_t *)d; |
| 94 | be16enc(wp, (int32_t)(j * vol) / 255); |
| 95 | } FILTER_LOOP_EPILOGUE(this->src, dst); |
| 96 | |
| 97 | return 0; |
| 98 | } |
| 99 | |