1 /* $NetBSD: libaudio.h,v 1.18 2013/08/30 20:57:26 mrg Exp $ */ 2 3 /* 4 * Copyright (c) 1999, 2009 Matthew R. Green 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 AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 /* 30 * audio formats 31 */ 32 #define AUDIO_FORMAT_DEFAULT -1 33 #define AUDIO_FORMAT_NONE 1 34 #define AUDIO_FORMAT_SUN 2 35 #define AUDIO_FORMAT_WAV 3 36 37 int audio_format_from_str (char *); 38 39 /* 40 * We copy the Sun/NeXT on-disk audio header format and document what 41 * we know of it here. 42 * 43 * The header size appears to be an offset to where the data really 44 * begins, rather than defining the real length of the audio header. 45 * The Sun/NeXT audio format seems to only use 24 bytes of data (with 46 * an additional 8 bytes of nuls written, padding it to 32 bytes). 47 * 48 * If the size of the audio data is unknown (eg, reading from a pipe) 49 * the Sun demo audio tools place AUDIO_UNKNOWN_SIZE in the 50 * `data_size' member. 51 * 52 * For stereo data, the channels appear to be interleaved with the 53 * left channel first. For more channels, who knows? 54 */ 55 56 /* 57 * This is the Sun/NeXT audio file magic value. Note that it 58 * is also `.snd' in ASCII. 59 */ 60 #define AUDIO_FILE_MAGIC ((u_int32_t)0x2e736e64) 61 #define AUDIO_UNKNOWN_SIZE ((unsigned)(~0)) 62 63 typedef struct { 64 u_int32_t magic; 65 u_int32_t hdr_size; /* header size; in bytes */ 66 u_int32_t data_size; /* optional; in bytes */ 67 u_int32_t encoding; /* see below */ 68 u_int32_t sample_rate; /* per second */ 69 u_int32_t channels; /* number of interleaved channels */ 70 } sun_audioheader; 71 72 #define Audio_filehdr sun_audioheader /* SunOS compat(?) */ 73 74 /* 75 * these are the types of "encoding" for above. taken from the 76 * SunOS <multimedia/audio_filehdr.h>. 77 */ 78 #define AUDIO_FILE_ENCODING_MULAW_8 1 79 #define AUDIO_FILE_ENCODING_LINEAR_8 2 80 #define AUDIO_FILE_ENCODING_LINEAR_16 3 81 #define AUDIO_FILE_ENCODING_LINEAR_24 4 82 #define AUDIO_FILE_ENCODING_LINEAR_32 5 83 #define AUDIO_FILE_ENCODING_FLOAT 6 84 #define AUDIO_FILE_ENCODING_DOUBLE 7 85 #define AUDIO_FILE_ENCODING_ADPCM_G721 23 86 #define AUDIO_FILE_ENCODING_ADPCM_G722 24 87 #define AUDIO_FILE_ENCODING_ADPCM_G723_3 25 88 #define AUDIO_FILE_ENCODING_ADPCM_G723_5 26 89 #define AUDIO_FILE_ENCODING_ALAW_8 27 90 91 const char *audio_enc_from_val (int); 92 int audio_enc_to_val (const char *); 93 94 int audio_sun_to_encoding (int, u_int *, u_int *); 95 int audio_encoding_to_sun (int, int, int *); 96 97 /* 98 * M$ WAV files, info gleamed from sox sources 99 */ 100 101 /* 102 * This is the WAV audio file magic value. Note that it 103 * is also `RIFF' and `WAVE' in ASCII. 104 */ 105 #define WAVAUDIO_FILE_MAGIC_RIFF ((u_int32_t)0x52494646) 106 #define WAVAUDIO_FILE_MAGIC_WAVE ((u_int32_t)0x57415645) 107 #define WAVAUDIO_FILE_MAGIC_FMT ((u_int32_t)0x666d7420) 108 #define WAVAUDIO_FILE_MAGIC_DATA ((u_int32_t)0x64617461) 109 110 /* purloined from public Microsoft RIFF docs via sox or mplayer */ 111 #define WAVE_FORMAT_UNKNOWN (0x0000) 112 #define WAVE_FORMAT_PCM (0x0001) 113 #define WAVE_FORMAT_ADPCM (0x0002) 114 #define WAVE_FORMAT_ALAW (0x0006) 115 #define WAVE_FORMAT_MULAW (0x0007) 116 #define WAVE_FORMAT_OKI_ADPCM (0x0010) 117 #define WAVE_FORMAT_IMA_ADPCM (0x0011) 118 #define WAVE_FORMAT_DIGISTD (0x0015) 119 #define WAVE_FORMAT_DIGIFIX (0x0016) 120 #define WAVE_FORMAT_DOLBY_AC2 (0x0030) 121 #define WAVE_FORMAT_GSM610 (0x0031) 122 #define WAVE_FORMAT_ROCKWELL_ADPCM (0x003b) 123 #define WAVE_FORMAT_ROCKWELL_DIGITALK (0x003c) 124 #define WAVE_FORMAT_G721_ADPCM (0x0040) 125 #define WAVE_FORMAT_G728_CELP (0x0041) 126 #define WAVE_FORMAT_MPEG (0x0050) 127 #define WAVE_FORMAT_MPEGLAYER3 (0x0055) 128 #define WAVE_FORMAT_G726_ADPCM (0x0064) 129 #define WAVE_FORMAT_G722_ADPCM (0x0065) 130 #define IBM_FORMAT_MULAW (0x0101) 131 #define IBM_FORMAT_ALAW (0x0102) 132 #define IBM_FORMAT_ADPCM (0x0103) 133 #define WAVE_FORMAT_EXTENSIBLE (0xfffe) 134 135 const char *wav_enc_from_val (int); 136 137 typedef struct { 138 char name[4]; 139 u_int32_t len; 140 } wav_audioheaderpart; 141 142 typedef struct { 143 u_int16_t tag; 144 u_int16_t channels; 145 u_int32_t sample_rate; 146 u_int32_t avg_bps; 147 u_int16_t alignment; 148 u_int16_t bits_per_sample; 149 } __packed wav_audioheaderfmt; 150 151 typedef struct { 152 u_int16_t len; 153 u_int16_t valid_bits; 154 u_int32_t speaker_pos_mask; 155 u_int16_t sub_tag; 156 u_int8_t dummy[14]; 157 } __packed wav_audiohdrextensible; 158 159 /* returns size of header, or -ve for failure */ 160 ssize_t audio_wav_parse_hdr (void *, size_t, u_int *, u_int *, u_int *, u_int *, size_t *); 161 162 extern int verbose; 163 164 /* 165 * audio routine error codes 166 */ 167 #define AUDIO_ENOENT -1 /* no such audio format */ 168 #define AUDIO_ESHORTHDR -2 /* short header */ 169 #define AUDIO_EWAVUNSUPP -3 /* WAV: unsupported file */ 170 #define AUDIO_EWAVBADPCM -4 /* WAV: bad PCM bps */ 171 #define AUDIO_EWAVNODATA -5 /* WAV: missing data */ 172 #define AUDIO_EINTERNAL -6 /* internal error */ 173 174 #define AUDIO_MAXERRNO 5 175 176 /* and something to get a string associated with this error */ 177 const char *audio_errstring (int); 178 179 /* 180 * generic routines? 181 */ 182 void decode_int (const char *, int *); 183 void decode_time (const char *, struct timeval *); 184 void decode_encoding (const char *, int *); 185 186 /* 187 * Write a sun/wav header, shared between record and merge. 188 * 189 * Note that write_header() may change the values of format, 190 * encoding. 191 */ 192 193 struct write_info { 194 int outfd; 195 char *header_info; 196 int format; 197 int encoding; 198 int precision; 199 int qflag; 200 ssize_t total_size; 201 int sample_rate; 202 int channels; 203 }; 204 205 typedef void (*write_conv_func) (u_char *, int); 206 207 void write_header (struct write_info *); 208 write_conv_func write_get_conv_func(struct write_info *); 209 210 /* backends for the above */ 211 int sun_prepare_header(struct write_info *wi, void **hdrp, size_t *lenp, int *leftp); 212 int wav_prepare_header(struct write_info *wi, void **hdrp, size_t *lenp, int *leftp); 213 write_conv_func sun_write_get_conv_func(struct write_info *wi); 214 write_conv_func wav_write_get_conv_func(struct write_info *wi); 215 216 extern char audio_default_info[8]; 217 218 /* 219 * get/put 16/32 bits of big/little endian data 220 */ 221 #include <sys/types.h> 222 #include <machine/endian.h> 223 #include <machine/bswap.h> 224 225 #if BYTE_ORDER == BIG_ENDIAN 226 227 #define getle16(v) bswap16(v) 228 #define getle32(v) bswap32(v) 229 #define getbe16(v) (v) 230 #define getbe32(v) (v) 231 232 #define putle16(x,v) (x) = bswap16(v) 233 #define putle32(x,v) (x) = bswap32(v) 234 #define putbe16(x,v) (x) = (v) 235 #define putbe32(x,v) (x) = (v) 236 237 #else 238 239 #define getle16(v) (v) 240 #define getle32(v) (v) 241 #define getbe16(v) bswap16(v) 242 #define getbe32(v) bswap32(v) 243 244 #define putle16(x,v) (x) = (v) 245 #define putle32(x,v) (x) = (v) 246 #define putbe16(x,v) (x) = bswap16(v) 247 #define putbe32(x,v) (x) = bswap32(v) 248 249 #endif 250