1 | /* $NetBSD: auconv.h,v 1.16 2011/11/23 23:07:31 jmcneill Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 1997 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Lennart Augustsson. |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in the |
17 | * documentation and/or other materials provided with the distribution. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
29 | * POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | |
32 | #ifndef _SYS_DEV_AUCONV_H_ |
33 | #define _SYS_DEV_AUCONV_H_ |
34 | #include <dev/audio_if.h> |
35 | |
36 | /* common routines for stream_filter_t */ |
37 | extern void stream_filter_set_fetcher(stream_filter_t *, stream_fetcher_t *); |
38 | extern void stream_filter_set_inputbuffer(stream_filter_t *, audio_stream_t *); |
39 | extern stream_filter_t *auconv_nocontext_filter_factory |
40 | (int (*)(struct audio_softc *, stream_fetcher_t *, audio_stream_t *, int)); |
41 | extern void auconv_nocontext_filter_dtor(struct stream_filter *); |
42 | #define FILTER_LOOP_PROLOGUE(SRC, SRCFRAME, DST, DSTFRAME, MAXUSED) \ |
43 | do { \ |
44 | const uint8_t *s; \ |
45 | uint8_t *d; \ |
46 | s = (SRC)->outp; \ |
47 | d = (DST)->inp; \ |
48 | for (; audio_stream_get_used(DST) < MAXUSED \ |
49 | && audio_stream_get_used(SRC) >= SRCFRAME; \ |
50 | s = audio_stream_add_outp(SRC, s, SRCFRAME), \ |
51 | d = audio_stream_add_inp(DST, d, DSTFRAME)) |
52 | #define FILTER_LOOP_EPILOGUE(SRC, DST) \ |
53 | (SRC)->outp = s; \ |
54 | (DST)->inp = d; \ |
55 | } while (/*CONSTCOND*/0) |
56 | |
57 | |
58 | /* Convert between signed and unsigned. */ |
59 | extern stream_filter_factory_t change_sign8; |
60 | extern stream_filter_factory_t change_sign16; |
61 | /* Convert between little and big endian. */ |
62 | extern stream_filter_factory_t swap_bytes; |
63 | extern stream_filter_factory_t swap_bytes_change_sign16; |
64 | /* Byte expansion/contraction */ |
65 | extern stream_filter_factory_t linear8_to_linear16; |
66 | extern stream_filter_factory_t linear16_to_linear8; |
67 | /* sampling rate conversion (aurateconv.c) */ |
68 | extern stream_filter_factory_t aurateconv; |
69 | |
70 | struct audio_format { |
71 | /** |
72 | * Device-dependent audio drivers may use this field freely. |
73 | */ |
74 | void *driver_data; |
75 | |
76 | /** |
77 | * combination of AUMODE_PLAY and AUMODE_RECORD |
78 | */ |
79 | int32_t mode; |
80 | |
81 | /** |
82 | * Encoding type. AUDIO_ENCODING_*. |
83 | * Don't use AUDIO_ENCODING_SLINEAR/ULINEAR/LINEAR/LINEAR8 |
84 | */ |
85 | u_int encoding; |
86 | |
87 | /** |
88 | * The size of valid bits in one sample. |
89 | * It must be <= precision. |
90 | */ |
91 | u_int validbits; |
92 | |
93 | /** |
94 | * The bit size of one sample. |
95 | * It must be >= validbits, and is usualy a multiple of 8. |
96 | */ |
97 | u_int precision; |
98 | |
99 | /** |
100 | * The number of channels. >= 1 |
101 | */ |
102 | u_int channels; |
103 | |
104 | u_int channel_mask; |
105 | #define AUFMT_UNKNOWN_POSITION 0U |
106 | #define AUFMT_FRONT_LEFT 0x00001U /* USB audio compatible */ |
107 | #define AUFMT_FRONT_RIGHT 0x00002U /* USB audio compatible */ |
108 | #define AUFMT_FRONT_CENTER 0x00004U /* USB audio compatible */ |
109 | #define AUFMT_LOW_FREQUENCY 0x00008U /* USB audio compatible */ |
110 | #define AUFMT_BACK_LEFT 0x00010U /* USB audio compatible */ |
111 | #define AUFMT_BACK_RIGHT 0x00020U /* USB audio compatible */ |
112 | #define AUFMT_FRONT_LEFT_OF_CENTER 0x00040U /* USB audio compatible */ |
113 | #define AUFMT_FRONT_RIGHT_OF_CENTER 0x00080U /* USB audio compatible */ |
114 | #define AUFMT_BACK_CENTER 0x00100U /* USB audio compatible */ |
115 | #define AUFMT_SIDE_LEFT 0x00200U /* USB audio compatible */ |
116 | #define AUFMT_SIDE_RIGHT 0x00400U /* USB audio compatible */ |
117 | #define AUFMT_TOP_CENTER 0x00800U /* USB audio compatible */ |
118 | #define AUFMT_TOP_FRONT_LEFT 0x01000U |
119 | #define AUFMT_TOP_FRONT_CENTER 0x02000U |
120 | #define AUFMT_TOP_FRONT_RIGHT 0x04000U |
121 | #define AUFMT_TOP_BACK_LEFT 0x08000U |
122 | #define AUFMT_TOP_BACK_CENTER 0x10000U |
123 | #define AUFMT_TOP_BACK_RIGHT 0x20000U |
124 | |
125 | #define AUFMT_MONAURAL AUFMT_FRONT_CENTER |
126 | #define AUFMT_STEREO (AUFMT_FRONT_LEFT | AUFMT_FRONT_RIGHT) |
127 | #define AUFMT_SURROUND4 (AUFMT_STEREO | AUFMT_BACK_LEFT \ |
128 | | AUFMT_BACK_RIGHT) |
129 | #define AUFMT_DOLBY_5_1 (AUFMT_SURROUND4 | AUFMT_FRONT_CENTER \ |
130 | | AUFMT_LOW_FREQUENCY) |
131 | |
132 | /** |
133 | * 0: frequency[0] is lower limit, and frequency[1] is higher limit. |
134 | * 1-16: frequency[0] to frequency[frequency_type-1] are valid. |
135 | */ |
136 | u_int frequency_type; |
137 | |
138 | #define AUFMT_MAX_FREQUENCIES 16 |
139 | /** |
140 | * sampling rates |
141 | */ |
142 | u_int frequency[AUFMT_MAX_FREQUENCIES]; |
143 | }; |
144 | |
145 | #define AUFMT_INVALIDATE(fmt) (fmt)->mode |= 0x80000000 |
146 | #define AUFMT_VALIDATE(fmt) (fmt)->mode &= 0x7fffffff |
147 | #define AUFMT_IS_VALID(fmt) (((fmt)->mode & 0x80000000) == 0) |
148 | |
149 | struct audio_encoding_set; |
150 | extern int auconv_set_converter(const struct audio_format *, int, |
151 | int, const audio_params_t *, int, |
152 | stream_filter_list_t *); |
153 | extern int auconv_create_encodings(const struct audio_format *, int, |
154 | struct audio_encoding_set **); |
155 | extern int auconv_delete_encodings(struct audio_encoding_set *); |
156 | extern int auconv_query_encoding(const struct audio_encoding_set *, |
157 | audio_encoding_t *); |
158 | |
159 | #endif /* !_SYS_DEV_AUCONV_H_ */ |
160 | |