diff options
Diffstat (limited to 'usr.bin/file/Magdir/audio')
| -rw-r--r-- | usr.bin/file/Magdir/audio | 78 |
1 files changed, 54 insertions, 24 deletions
diff --git a/usr.bin/file/Magdir/audio b/usr.bin/file/Magdir/audio index 6b4cb36..4dc9ddd 100644 --- a/usr.bin/file/Magdir/audio +++ b/usr.bin/file/Magdir/audio @@ -1,43 +1,73 @@ + +#------------------------------------------------------------------------------ +# audio: file(1) magic for sound formats (see also "iff") # -# Sound formats, from Jan Nicolai Langfeldt <janl@ifi.uio.no>, +# Jan Nicolai Langfeldt (janl@ifi.uio.no), Dan Quinlan (quinlan@yggdrasil.com), +# and others # # Sun/NeXT audio data -0 string .snd audio data: ->12 belong 1 8-bit u-law, ->12 belong 2 8-bit linear PCM, +0 string .snd Sun/NeXT audio data: +>12 belong 1 8-bit ISDN u-law, +>12 belong 2 8-bit linear PCM [REF-PCM], >12 belong 3 16-bit linear PCM, >12 belong 4 24-bit linear PCM, >12 belong 5 32-bit linear PCM, ->12 belong 6 32-bit floating point, ->12 belong 7 64-bit floating point, ->12 belong 23 compressed (G.721 ADPCM), +>12 belong 6 32-bit IEEE floating point, +>12 belong 7 64-bit IEEE floating point, +>12 belong 23 8-bit ISDN u-law compressed (CCITT G.721 ADPCM voice data encoding), >20 belong 1 mono, >20 belong 2 stereo, >20 belong 4 quad, ->16 belong x %d Hz +>16 belong >0 %d Hz + # DEC systems (e.g. DECstation 5000) use a variant of the Sun/NeXT format # that uses little-endian encoding and has a different magic number -# (0x0064732E in little-endian encoding). 0 lelong 0x0064732E DEC audio data: ->12 lelong 1 8-bit u-law, ->12 lelong 2 8-bit linear PCM, +>12 lelong 1 8-bit ISDN u-law, +>12 lelong 2 8-bit linear PCM [REF-PCM], >12 lelong 3 16-bit linear PCM, >12 lelong 4 24-bit linear PCM, >12 lelong 5 32-bit linear PCM, ->12 lelong 6 32-bit floating point, ->12 lelong 7 64-bit floating point, ->12 lelong 23 compressed (G.721 ADPCM), +>12 lelong 6 32-bit IEEE floating point, +>12 lelong 7 64-bit IEEE floating point, +>12 lelong 23 8-bit ISDN u-law compressed (CCITT G.721 ADPCM voice data encoding), >20 lelong 1 mono, >20 lelong 2 stereo, >20 lelong 4 quad, ->16 lelong x %d Hz -# Bytes 0-3 of AIFF, AIFF-C, & 8SVX audio files are "FORM" -8 string AIFF AIFF audio data -8 string AIFC AIFF-C audio data -8 string 8SVX IFF/8SVX audio data -# Bytes 0-3 of Waveform (*.wav) audio files are "RIFF" -8 string WAVE Waveform audio data -0 string Creative\ Voice\ File Soundblaster audio data -0 long 0x4e54524b MultiTrack sound data file ->4 long x - version %ld +>16 lelong >0 %d Hz + +# Creative Labs AUDIO stuff +0 string MThd Standard MIDI data +>9 byte >0 (format %d) +>11 byte >1 using %d channels +0 string CTMF Creative Music (CMF) data +0 string SBI SoundBlaster instrument data +0 string Creative\ Voice\ File Creative Labs voice data +# is this next line right? it came this way... +>19 byte 0x1A +>23 byte >0 - version %d +>22 byte >0 \b.%d + +# first entry is also the string "NTRK" +0 belong 0x4e54524b MultiTrack sound data +>4 belong x - version %ld + +# Microsoft WAVE format (*.wav) +# [GRR 950115: probably all of the shorts and longs should be leshort/lelong] +0 string RIFF Microsoft RIFF +>8 string WAVE \b, WAVE audio data +>34 short >0 \b, %d bit +>22 short =1 \b, mono +>22 short =2 \b, stereo +>22 short >2 \b, %d channels +>24 long >0 %d Hz + +# Extended MOD format (*.emd) (Greg Roelofs, newt@uchicago.edu); NOT TESTED +# [based on posting 940824 by "Dirk/Elastik", husberg@lehtori.cc.tut.fi] +0 string EMOD Extended MOD sound data, +>4 byte&0xf0 x version %d +>4 byte&0x0f x \b.%d, +>45 byte x %d instruments +>83 byte 0 (module) +>83 byte 1 (song) |
