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 | |