/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License, Version 1.0 only * (the "License"). You may not use this file except in compliance * with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2004 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #ifndef _AUDIO_AU_H #define _AUDIO_AU_H #include <sys/isa_defs.h> #include <sys/types.h> #ifdef __cplusplus extern "C" { #endif /* * Define an on-disk audio file header for the AU file format. * * Note that there is an optional 'info' field that immediately follows this * structure in the file. It is an optional length field that is sometimes * used to store additional information. At the minimum, it is at * least 4 bytes. * * The offset field is problematic in the general case because the * field is really "data location", which does not ensure that all * the bytes between the header and the data are really 'info'. * Further, there are no absolute guarantees that the info is ASCII text. * * When audio files are passed through pipes, the au_data_size field may * not be known in advance. In such cases, au_data_size should be * set to AUDIO_AU_UNKNOWN_SIZE. */ struct au_filehdr { uint32_t au_magic; /* magic number */ uint32_t au_offset; /* size of this header */ uint32_t au_data_size; /* length of data */ uint32_t au_encoding; /* data encoding format */ uint32_t au_sample_rate; /* samples per second */ uint32_t au_channels; /* number of interleaved channels */ }; typedef struct au_filehdr au_filehdr_t; /* * This is the appearance of a typical AU audio file as described * by this structure. * * ------------------------------------------------------------ * | | | | * | AU Audio Header | Info | Audio Data | * | | (optional) | | * | | | | * | 24 bytes | 4 bytes (min) | n bytes | * | | | | * ------------------------------------------------------------ */ /* Define the magic number */ #define AUDIO_AU_FILE_MAGIC ((uint32_t)0x2e736e64) /* ".snd" */ /* Unknown header size */ #define AUDIO_AU_UNKNOWN_SIZE ((unsigned)(~0)) /* (unsigned) -1 */ /* Define the AU encoding fields */ #define AUDIO_AU_ENCODING_ULAW (1) /* 8-bit u-law */ #define AUDIO_AU_ENCODING_LINEAR_8 (2) /* 8-bit linear PCM */ #define AUDIO_AU_ENCODING_LINEAR_16 (3) /* 16-bit linear PCM */ #define AUDIO_AU_ENCODING_LINEAR_24 (4) /* 24-bit linear PCM */ #define AUDIO_AU_ENCODING_LINEAR_32 (5) /* 32-bit linear PCM */ #define AUDIO_AU_ENCODING_FLOAT (6) /* 32-bit IEEE floating point */ #define AUDIO_AU_ENCODING_DOUBLE (7) /* 64-bit IEEE double */ /* precision float */ #define AUDIO_AU_ENCODING_FRAGMENTED (8) /* Fragmented sample data */ #define AUDIO_AU_ENCODING_DSP (10) /* DSP program */ #define AUDIO_AU_ENCODING_FIXED_8 (11) /* 8-bit fixed point */ #define AUDIO_AU_ENCODING_FIXED_16 (12) /* 16-bit fixed point */ #define AUDIO_AU_ENCODING_FIXED_24 (13) /* 24-bit fixed point */ #define AUDIO_AU_ENCODING_FIXED_32 (14) /* 32-bit fixed point */ #define AUDIO_AU_ENCODING_EMPHASIS (18) /* 16-bit linear with */ /* emphasis */ #define AUDIO_AU_ENCODING_COMPRESSED (19) /* 16-bit linear compressed */ #define AUDIO_AU_ENCODING_EMP_COMP (20) /* 16-bit linear with */ /* emphasis and compression */ #define AUDIO_AU_ENCODING_MUSIC_KIT (21) /* Music kit DSP commands */ #define AUDIO_AU_ENCODING_ADPCM_G721 (23) /* 4-bit CCITT G.721 ADPCM */ #define AUDIO_AU_ENCODING_ADPCM_G722 (24) /* CCITT G.722 ADPCM */ #define AUDIO_AU_ENCODING_ADPCM_G723_3 (25) /* CCITT G.723.3 ADPCM */ #define AUDIO_AU_ENCODING_ADPCM_G723_5 (26) /* CCITT G.723.5 ADPCM */ #define AUDIO_AU_ENCODING_ALAW (27) /* 8-bit A-law G.711 */ /* Byte swapping routines */ #if defined(_BIG_ENDIAN) #define AUDIO_AU_FILE2HOST(from, to) *((long *)(to)) = *((long *)(from)) #else #define AUDIO_AU_FILE2HOST(from, to) \ ((char *)(to))[0] = ((char *)(from))[3]; \ ((char *)(to))[1] = ((char *)(from))[2]; \ ((char *)(to))[2] = ((char *)(from))[1]; \ ((char *)(to))[3] = ((char *)(from))[0]; #endif /* byte swapping */ #if defined(__sparc) || defined(__i386) || defined(__amd64) #define AUDIO_AU_HOST2FILE(from, to) AUDIO_AU_FILE2HOST((from), (to)) #else #error unknown machine type; #endif /* encode */ #ifdef __cplusplus } #endif #endif /* _AUDIO_AU_H */
