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#------------------------------------------------------------------------------
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# $File: riff,v 1.18 2009/09/19 16:28:12 christos Exp $
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# riff: file(1) magic for RIFF format
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# See
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#
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# http://www.seanet.com/users/matts/riffmci/riffmci.htm
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#
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# AVI section extended by Patrik Rådman <patrik+file-magic@iki.fi>
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#
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0 string RIFF RIFF (little-endian) data
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# RIFF Palette format
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>8 string PAL \b, palette
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>>16 leshort x \b, version %d
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>>18 leshort x \b, %d entries
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# RIFF Device Independent Bitmap format
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>8 string RDIB \b, device-independent bitmap
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>>16 string BM
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>>>30 leshort 12 \b, OS/2 1.x format
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>>>>34 leshort x \b, %d x
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>>>>36 leshort x %d
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>>>30 leshort 64 \b, OS/2 2.x format
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>>>>34 leshort x \b, %d x
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>>>>36 leshort x %d
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>>>30 leshort 40 \b, Windows 3.x format
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>>>>34 lelong x \b, %d x
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>>>>38 lelong x %d x
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>>>>44 leshort x %d
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# RIFF MIDI format
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>8 string RMID \b, MIDI
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# RIFF Multimedia Movie File format
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>8 string RMMP \b, multimedia movie
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# RIFF wrapper for MP3
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>8 string RMP3 \b, MPEG Layer 3 audio
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# Microsoft WAVE format (*.wav)
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>8 string WAVE \b, WAVE audio
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!:mime audio/x-wav
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>>20 leshort 1 \b, Microsoft PCM
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>>>34 leshort >0 \b, %d bit
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>>20 leshort 2 \b, Microsoft ADPCM
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>>20 leshort 6 \b, ITU G.711 A-law
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>>20 leshort 7 \b, ITU G.711 mu-law
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>>20 leshort 17 \b, IMA ADPCM
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>>20 leshort 20 \b, ITU G.723 ADPCM (Yamaha)
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>>20 leshort 49 \b, GSM 6.10
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>>20 leshort 64 \b, ITU G.721 ADPCM
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>>20 leshort 80 \b, MPEG
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>>20 leshort 85 \b, MPEG Layer 3
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>>22 leshort =1 \b, mono
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>>22 leshort =2 \b, stereo
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>>22 leshort >2 \b, %d channels
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>>24 lelong >0 %d Hz
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# Corel Draw Picture
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>8 string CDRA \b, Corel Draw Picture
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!:mime image/x-coreldraw
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# AVI == Audio Video Interleave
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>8 string AVI\040 \b, AVI
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!:mime video/x-msvideo
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>>12 string LIST
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>>>20 string hdrlavih
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>>>>&36 lelong x \b, %lu x
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>>>>&40 lelong x %lu,
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>>>>&4 lelong >1000000 <1 fps,
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>>>>&4 lelong 1000000 1.00 fps,
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>>>>&4 lelong 500000 2.00 fps,
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>>>>&4 lelong 333333 3.00 fps,
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>>>>&4 lelong 250000 4.00 fps,
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>>>>&4 lelong 200000 5.00 fps,
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>>>>&4 lelong 166667 6.00 fps,
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>>>>&4 lelong 142857 7.00 fps,
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>>>>&4 lelong 125000 8.00 fps,
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>>>>&4 lelong 111111 9.00 fps,
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>>>>&4 lelong 100000 10.00 fps,
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# ]9.9,10.1[
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>>>>&4 lelong <101010
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>>>>>&-4 lelong >99010
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>>>>>>&-4 lelong !100000 ~10 fps,
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>>>>&4 lelong 83333 12.00 fps,
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# ]11.9,12.1[
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>>>>&4 lelong <84034
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>>>>>&-4 lelong >82645
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>>>>>>&-4 lelong !83333 ~12 fps,
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>>>>&4 lelong 66667 15.00 fps,
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# ]14.9,15.1[
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>>>>&4 lelong <67114
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>>>>>&-4 lelong >66225
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>>>>>>&-4 lelong !66667 ~15 fps,
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>>>>&4 lelong 50000 20.00 fps,
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>>>>&4 lelong 41708 23.98 fps,
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>>>>&4 lelong 41667 24.00 fps,
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# ]23.9,24.1[
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>>>>&4 lelong <41841
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>>>>>&-4 lelong >41494
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>>>>>>&-4 lelong !41708
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>>>>>>>&-4 lelong !41667 ~24 fps,
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>>>>&4 lelong 40000 25.00 fps,
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# ]24.9,25.1[
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>>>>&4 lelong <40161
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>>>>>&-4 lelong >39841
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>>>>>>&-4 lelong !40000 ~25 fps,
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>>>>&4 lelong 33367 29.97 fps,
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>>>>&4 lelong 33333 30.00 fps,
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# ]29.9,30.1[
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>>>>&4 lelong <33445
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>>>>>&-4 lelong >33223
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>>>>>>&-4 lelong !33367
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>>>>>>>&-4 lelong !33333 ~30 fps,
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>>>>&4 lelong <32224 >30 fps,
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##>>>>&4 lelong x (%lu)
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##>>>>&20 lelong x %lu frames,
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# Note: The tests below assume that the AVI has 1 or 2 streams,
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# "vids" optionally followed by "auds".
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# (Should cover 99.9% of all AVIs.)
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# assuming avih length = 56
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>>>88 string LIST
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>>>>96 string strlstrh
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>>>>>108 string vids video:
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>>>>>>&0 lelong 0 uncompressed
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# skip past vids strh
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>>>>>>(104.l+108) string strf
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>>>>>>>(104.l+132) lelong 1 RLE 8bpp
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>>>>>>>(104.l+132) string/c cvid Cinepak
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>>>>>>>(104.l+132) string/c i263 Intel I.263
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>>>>>>>(104.l+132) string/c iv32 Indeo 3.2
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>>>>>>>(104.l+132) string/c iv41 Indeo 4.1
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>>>>>>>(104.l+132) string/c iv50 Indeo 5.0
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>>>>>>>(104.l+132) string/c mp42 Microsoft MPEG-4 v2
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>>>>>>>(104.l+132) string/c mp43 Microsoft MPEG-4 v3
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>>>>>>>(104.l+132) string/c fmp4 FFMpeg MPEG-4
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>>>>>>>(104.l+132) string/c mjpg Motion JPEG
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>>>>>>>(104.l+132) string/c div3 DivX 3
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>>>>>>>>112 string/c div3 Low-Motion
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>>>>>>>>112 string/c div4 Fast-Motion
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>>>>>>>(104.l+132) string/c divx DivX 4
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>>>>>>>(104.l+132) string/c dx50 DivX 5
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>>>>>>>(104.l+132) string/c xvid XviD
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>>>>>>>(104.l+132) string/c h264 H.264
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>>>>>>>(104.l+132) string/c wmv3 Windows Media Video 9
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>>>>>>>(104.l+132) string/c h264 X.264 or H.264
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>>>>>>>(104.l+132) lelong 0
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##>>>>>>>(104.l+132) string x (%.4s)
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# skip past first (video) LIST
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>>>>(92.l+96) string LIST
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>>>>>(92.l+104) string strlstrh
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>>>>>>(92.l+116) string auds \b, audio:
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# auds strh length = 56:
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>>>>>>>(92.l+172) string strf
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>>>>>>>>(92.l+180) leshort 0x0001 uncompressed PCM
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>>>>>>>>(92.l+180) leshort 0x0002 ADPCM
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>>>>>>>>(92.l+180) leshort 0x0006 aLaw
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>>>>>>>>(92.l+180) leshort 0x0007 uLaw
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>>>>>>>>(92.l+180) leshort 0x0050 MPEG-1 Layer 1 or 2
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>>>>>>>>(92.l+180) leshort 0x0055 MPEG-1 Layer 3
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>>>>>>>>(92.l+180) leshort 0x2000 Dolby AC3
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>>>>>>>>(92.l+180) leshort 0x0161 DivX
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##>>>>>>>>(92.l+180) leshort x (0x%.4x)
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>>>>>>>>(92.l+182) leshort 1 (mono,
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>>>>>>>>(92.l+182) leshort 2 (stereo,
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>>>>>>>>(92.l+182) leshort >2 (%d channels,
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>>>>>>>>(92.l+184) lelong x %d Hz)
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# auds strh length = 64:
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>>>>>>>(92.l+180) string strf
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>>>>>>>>(92.l+188) leshort 0x0001 uncompressed PCM
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>>>>>>>>(92.l+188) leshort 0x0002 ADPCM
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>>>>>>>>(92.l+188) leshort 0x0055 MPEG-1 Layer 3
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>>>>>>>>(92.l+188) leshort 0x2000 Dolby AC3
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>>>>>>>>(92.l+188) leshort 0x0161 DivX
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##>>>>>>>>(92.l+188) leshort x (0x%.4x)
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>>>>>>>>(92.l+190) leshort 1 (mono,
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>>>>>>>>(92.l+190) leshort 2 (stereo,
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>>>>>>>>(92.l+190) leshort >2 (%d channels,
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>>>>>>>>(92.l+192) lelong x %d Hz)
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# Animated Cursor format
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>8 string ACON \b, animated cursor
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# SoundFont 2 <mpruett@sgi.com>
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>8 string sfbk SoundFont/Bank
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# MPEG-1 wrapped in a RIFF, apparently
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>8 string CDXA \b, wrapped MPEG-1 (CDXA)
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>8 string 4XMV \b, 4X Movie file
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#
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# XXX - some of the below may only appear in little-endian form.
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#
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# Also "MV93" appears to be for one form of Macromedia Director
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# files, and "GDMF" appears to be another multimedia format.
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#
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0 string RIFX RIFF (big-endian) data
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# RIFF Palette format
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>8 string PAL \b, palette
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>>16 beshort x \b, version %d
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>>18 beshort x \b, %d entries
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# RIFF Device Independent Bitmap format
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>8 string RDIB \b, device-independent bitmap
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>>16 string BM
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>>>30 beshort 12 \b, OS/2 1.x format
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>>>>34 beshort x \b, %d x
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>>>>36 beshort x %d
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>>>30 beshort 64 \b, OS/2 2.x format
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>>>>34 beshort x \b, %d x
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>>>>36 beshort x %d
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>>>30 beshort 40 \b, Windows 3.x format
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>>>>34 belong x \b, %d x
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>>>>38 belong x %d x
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>>>>44 beshort x %d
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# RIFF MIDI format
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>8 string RMID \b, MIDI
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# RIFF Multimedia Movie File format
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>8 string RMMP \b, multimedia movie
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# Microsoft WAVE format (*.wav)
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>8 string WAVE \b, WAVE audio
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>>20 leshort 1 \b, Microsoft PCM
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>>>34 leshort >0 \b, %d bit
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>>22 beshort =1 \b, mono
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>>22 beshort =2 \b, stereo
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>>22 beshort >2 \b, %d channels
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>>24 belong >0 %d Hz
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# Corel Draw Picture
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>8 string CDRA \b, Corel Draw Picture
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# AVI == Audio Video Interleave
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>8 string AVI\040 \b, AVI
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# Animated Cursor format
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>8 string ACON \b, animated cursor
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# Notation Interchange File Format (big-endian only)
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>8 string NIFF \b, Notation Interchange File Format
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# SoundFont 2 <mpruett@sgi.com>
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>8 string sfbk SoundFont/Bank
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