projects / apple / file_cmds.git / blame
| Commit | Line | Data |
|---|---|---|
| 440bd198 A |
1 | |
| 2 | #------------------------------------------------------------------------------ | |
| 3 | # audio: file(1) magic for sound formats (see also "iff") | |
| 4 | # | |
| 5 | # Jan Nicolai Langfeldt (janl@ifi.uio.no), Dan Quinlan (quinlan@yggdrasil.com), | |
| 6 | # and others | |
| 7 | # | |
| 8 | ||
| 9 | # Sun/NeXT audio data | |
| 10 | 0 string .snd Sun/NeXT audio data: | |
| 11 | >12 belong 1 8-bit ISDN u-law, | |
| 12 | >12 belong 2 8-bit linear PCM [REF-PCM], | |
| 13 | >12 belong 3 16-bit linear PCM, | |
| 14 | >12 belong 4 24-bit linear PCM, | |
| 15 | >12 belong 5 32-bit linear PCM, | |
| 16 | >12 belong 6 32-bit IEEE floating point, | |
| 17 | >12 belong 7 64-bit IEEE floating point, | |
| 18 | >12 belong 23 8-bit ISDN u-law compressed (CCITT G.721 ADPCM voice data encoding), | |
| 19 | >12 belong 24 compressed (8-bit G.722 ADPCM) | |
| 20 | >12 belong 25 compressed (3-bit G.723 ADPCM), | |
| 21 | >12 belong 26 compressed (5-bit G.723 ADPCM), | |
| 22 | >12 belong 27 8-bit A-law, | |
| 23 | >20 belong 1 mono, | |
| 24 | >20 belong 2 stereo, | |
| 25 | >20 belong 4 quad, | |
| 26 | >16 belong >0 %d Hz | |
| 27 | ||
| 28 | # DEC systems (e.g. DECstation 5000) use a variant of the Sun/NeXT format | |
| 29 | # that uses little-endian encoding and has a different magic number | |
| 30 | 0 lelong 0x0064732E DEC audio data: | |
| 31 | >12 lelong 1 8-bit ISDN u-law, | |
| 32 | >12 lelong 2 8-bit linear PCM [REF-PCM], | |
| 33 | >12 lelong 3 16-bit linear PCM, | |
| 34 | >12 lelong 4 24-bit linear PCM, | |
| 35 | >12 lelong 5 32-bit linear PCM, | |
| 36 | >12 lelong 6 32-bit IEEE floating point, | |
| 37 | >12 lelong 7 64-bit IEEE floating point, | |
| 38 | >12 lelong 23 8-bit ISDN u-law compressed (CCITT G.721 ADPCM voice data encoding), | |
| 39 | >20 lelong 1 mono, | |
| 40 | >20 lelong 2 stereo, | |
| 41 | >20 lelong 4 quad, | |
| 42 | >16 lelong >0 %d Hz | |
| 43 | ||
| 44 | # Creative Labs AUDIO stuff | |
| 45 | 0 string MThd Standard MIDI data | |
| 46 | >9 byte >0 (format %d) | |
| 47 | >11 byte >1 using %d channels | |
| 48 | 0 string CTMF Creative Music (CMF) data | |
| 49 | 0 string SBI SoundBlaster instrument data | |
| 50 | 0 string Creative\ Voice\ File Creative Labs voice data | |
| 51 | # is this next line right? it came this way... | |
| 52 | >19 byte 0x1A | |
| 53 | >23 byte >0 - version %d | |
| 54 | >22 byte >0 \b.%d | |
| 55 | ||
| 56 | # first entry is also the string "NTRK" | |
| 57 | 0 belong 0x4e54524b MultiTrack sound data | |
| 58 | >4 belong x - version %ld | |
| 59 | ||
| 60 | # Microsoft WAVE format (*.wav) | |
| 61 | 0 string RIFF Microsoft RIFF | |
| 62 | >8 string WAVE \b, WAVE audio data | |
| 63 | >>34 leshort >0 \b, %d bit | |
| 64 | >>22 leshort =1 \b, mono | |
| 65 | >>22 leshort =2 \b, stereo | |
| 66 | >>22 leshort >2 \b, %d channels | |
| 67 | >>24 lelong >0 %d Hz | |
| 68 | # AVI == Audio Video Interleave | |
| 69 | >8 string AVI\ \b, AVI data | |
| 70 | ||
| 71 | # Extended MOD format (*.emd) (Greg Roelofs, newt@uchicago.edu); NOT TESTED | |
| 72 | # [based on posting 940824 by "Dirk/Elastik", husberg@lehtori.cc.tut.fi] | |
| 73 | 0 string EMOD Extended MOD sound data, | |
| 74 | >4 byte&0xf0 x version %d | |
| 75 | >4 byte&0x0f x \b.%d, | |
| 76 | >45 byte x %d instruments | |
| 77 | >83 byte 0 (module) | |
| 78 | >83 byte 1 (song) | |
| 79 | ||
| 80 | # Real Audio (Magic .ra\0375) | |
| 81 | 0 belong 0x2e7261fd realaudio sound file | |
| 82 | ||
| 83 | # MTM/669/FAR/S3M/ULT/XM format checking [Aaron Eppert, aeppert@dialin.ind.net] | |
| 84 | # Oct 31, 1995 | |
| 85 | 0 string MTM MultiTracker Module sound file | |
| 86 | 0 string if Composer 669 Module sound data | |
| 87 | 0 string FAR Module sound data | |
| 88 | 0 string MAS_U ULT(imate) Module sound data | |
| 89 | 0x2c string SCRM ScreamTracker III Module sound data | |
| 90 | 0 string Extended Module Extended Module sound data |