audiofil.h revision 1.2.2.2
1 1.2.2.2 christos /* $NetBSD: audiofil.h,v 1.2.2.2 2019/06/10 22:07:06 christos Exp $ */ 2 1.2.2.2 christos 3 1.2.2.2 christos /* 4 1.2.2.2 christos * Copyright (C) 2017 Tetsuya Isaki. All rights reserved. 5 1.2.2.2 christos * Copyright (C) 2017 Y.Sugahara (moveccr). All rights reserved. 6 1.2.2.2 christos * 7 1.2.2.2 christos * Redistribution and use in source and binary forms, with or without 8 1.2.2.2 christos * modification, are permitted provided that the following conditions 9 1.2.2.2 christos * are met: 10 1.2.2.2 christos * 1. Redistributions of source code must retain the above copyright 11 1.2.2.2 christos * notice, this list of conditions and the following disclaimer. 12 1.2.2.2 christos * 2. Redistributions in binary form must reproduce the above copyright 13 1.2.2.2 christos * notice, this list of conditions and the following disclaimer in the 14 1.2.2.2 christos * documentation and/or other materials provided with the distribution. 15 1.2.2.2 christos * 16 1.2.2.2 christos * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 1.2.2.2 christos * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 1.2.2.2 christos * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 1.2.2.2 christos * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 1.2.2.2 christos * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 1.2.2.2 christos * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 1.2.2.2 christos * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 1.2.2.2 christos * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 1.2.2.2 christos * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.2.2.2 christos * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.2.2.2 christos * SUCH DAMAGE. 27 1.2.2.2 christos */ 28 1.2.2.2 christos 29 1.2.2.2 christos #ifndef _SYS_DEV_AUDIO_AUDIOFIL_H_ 30 1.2.2.2 christos #define _SYS_DEV_AUDIO_AUDIOFIL_H_ 31 1.2.2.2 christos 32 1.2.2.2 christos /* 33 1.2.2.2 christos * Number of bits for internal format. 34 1.2.2.2 christos * XXX 32bit mode is not completed. 35 1.2.2.2 christos * XXX Is this necessary? 36 1.2.2.2 christos */ 37 1.2.2.2 christos #define AUDIO_INTERNAL_BITS 16 38 1.2.2.2 christos /*#define AUDIO_INTERNAL_BITS 32 */ 39 1.2.2.2 christos 40 1.2.2.2 christos #if AUDIO_INTERNAL_BITS == 16 41 1.2.2.2 christos 42 1.2.2.2 christos typedef int16_t aint_t; /* audio integer */ 43 1.2.2.2 christos typedef uint16_t auint_t; /* audio unsigned integer */ 44 1.2.2.2 christos typedef int32_t aint2_t; /* audio wide integer */ 45 1.2.2.2 christos typedef uint32_t auint2_t; /* audio unsigned wide integer */ 46 1.2.2.2 christos #define AINT_T_MAX ((aint_t)0x7fff) 47 1.2.2.2 christos #define AINT_T_MIN ((aint_t)0x8000) 48 1.2.2.2 christos 49 1.2.2.2 christos #elif AUDIO_INTERNAL_BITS == 32 50 1.2.2.2 christos 51 1.2.2.2 christos typedef int32_t aint_t; 52 1.2.2.2 christos typedef uint32_t auint_t; 53 1.2.2.2 christos typedef int64_t aint2_t; 54 1.2.2.2 christos typedef uint64_t auint2_t; 55 1.2.2.2 christos #define AINT_T_MAX ((aint_t)0x7fffffff) 56 1.2.2.2 christos #define AINT_T_MIN ((aint_t)0x80000000) 57 1.2.2.2 christos 58 1.2.2.2 christos #else 59 1.2.2.2 christos #error Invalid AUDIO_INTERNAL_BITS 60 1.2.2.2 christos #endif 61 1.2.2.2 christos 62 1.2.2.2 christos /* 63 1.2.2.2 christos * audio format. 64 1.2.2.2 christos * 65 1.2.2.2 christos * precision <= stride always holds. 66 1.2.2.2 christos */ 67 1.2.2.2 christos typedef struct { 68 1.2.2.2 christos u_int sample_rate; /* sample rate in Hz */ 69 1.2.2.2 christos u_int encoding; /* AUDIO_ENCODING_* */ 70 1.2.2.2 christos u_int stride; /* container bits of a sample */ 71 1.2.2.2 christos u_int precision; /* valid bits of a sample */ 72 1.2.2.2 christos u_int channels; /* 1..AUDIO_MAX_CHANNELS */ 73 1.2.2.2 christos } audio_format2_t; 74 1.2.2.2 christos 75 1.2.2.2 christos /* Parameters for conversion filters */ 76 1.2.2.2 christos typedef struct { 77 1.2.2.2 christos /* Pointer to source samples. */ 78 1.2.2.2 christos const void *src; 79 1.2.2.2 christos /* Input format */ 80 1.2.2.2 christos const audio_format2_t *srcfmt; 81 1.2.2.2 christos 82 1.2.2.2 christos /* Pointer to destination buffer. */ 83 1.2.2.2 christos void *dst; 84 1.2.2.2 christos /* Output format */ 85 1.2.2.2 christos const audio_format2_t *dstfmt; 86 1.2.2.2 christos 87 1.2.2.2 christos /* 88 1.2.2.2 christos * Number of frames to be converted. 89 1.2.2.2 christos * The conversion filter must output 'count' frames. src and dst 90 1.2.2.2 christos * are guaranteed that at least 'count' frames are contiguous. 91 1.2.2.2 christos * The caller does not reference this count after calling, so 92 1.2.2.2 christos * that the conversion filter can use passed this variable. 93 1.2.2.2 christos * For example, decrementing it directly. 94 1.2.2.2 christos */ 95 1.2.2.2 christos u_int count; 96 1.2.2.2 christos 97 1.2.2.2 christos /* The conversion filters can use this pointer. */ 98 1.2.2.2 christos void *context; 99 1.2.2.2 christos } audio_filter_arg_t; 100 1.2.2.2 christos 101 1.2.2.2 christos typedef void(*audio_filter_t)(audio_filter_arg_t *arg); 102 1.2.2.2 christos 103 1.2.2.2 christos /* Filter registration structure */ 104 1.2.2.2 christos typedef struct { 105 1.2.2.2 christos audio_filter_t codec; /* conversion function */ 106 1.2.2.2 christos void *context; /* optional codec's argument */ 107 1.2.2.2 christos } audio_filter_reg_t; 108 1.2.2.2 christos 109 1.2.2.2 christos #endif /* !_SYS_DEV_AUDIO_AUDIOFIL_H_ */ 110
Indexes created Thu Oct 23 18:09:57 GMT 2025