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Editing: riff

#------------------------------------------------------------------------------
# $File: riff,v 1.35 2020/06/05 17:15:03 christos Exp $
# riff:  file(1) magic for RIFF format
# See
#
#	https://www.seanet.com/users/matts/riffmci/riffmci.htm
#	http://www-mmsp.ece.mcgill.ca/Documents/AudioFormats/WAVE/Docs/riffmci.pdf
#

# audio format tag. Assume limits: max 1024 bit, 128 channels, 1 MHz
0   name    riff-wave
>0	leshort		1		\b, Microsoft PCM
>>14	leshort		>0
>>>14	leshort		<1024	\b, %d bit
>0	leshort		2		\b, Microsoft ADPCM
>0	leshort		6		\b, ITU G.711 A-law
>0	leshort		7		\b, ITU G.711 mu-law
>0	leshort		8		\b, Microsoft DTS
>0	leshort		17		\b, IMA ADPCM
>0	leshort		20		\b, ITU G.723 ADPCM (Yamaha)
>0	leshort		49		\b, GSM 6.10
>0	leshort		64		\b, ITU G.721 ADPCM
>0	leshort		80		\b, MPEG
>0	leshort		85		\b, MPEG Layer 3
>0	leshort		0x2001		\b, DTS
>2	leshort		=1		\b, mono
>2	leshort		=2		\b, stereo
>2	leshort		>2
>>2	leshort		<128	\b, %d channels
>4	lelong		>0
>>4	lelong		<1000000	%d Hz

# try to find "fmt "
0   name    riff-walk
>0  string  fmt\x20
>>4 lelong  <0x80
>>>8 use    riff-wave
>0  string  LIST
>>&(4.l+4)  use riff-walk
>0  string  DISP
>>&(4.l+4)  use riff-walk
>0  string  bext
>>&(4.l+4)  use riff-walk
>0  string  Fake
>>&(4.l+4)  use riff-walk
>0  string  fact
>>&(4.l+4)  use riff-walk
>0  string  VP8
>>11		byte		0x9d
>>>12		byte		0x01
>>>>13		byte		0x2a	\b, VP8 encoding
>>>>>14		leshort&0x3fff	x	\b, %d
>>>>>16		leshort&0x3fff	x	\bx%d, Scaling:
>>>>>14		leshort&0xc000	0x0000	\b [none]
>>>>>14		leshort&0xc000	0x1000	\b [5/4]
>>>>>14		leshort&0xc000	0x2000	\b [5/3]
>>>>>14		leshort&0xc000	0x3000	\b [2]
>>>>>14		leshort&0xc000	0x0000	\bx[none]
>>>>>14		leshort&0xc000	0x1000	\bx[5/4]
>>>>>14		leshort&0xc000	0x2000	\bx[5/3]
>>>>>14		leshort&0xc000	0x3000	\bx[2]
>>>>>15		byte&0x80	=0x00	\b, YUV color
>>>>>15		byte&0x80	=0x80	\b, bad color specification
>>>>>15		byte&0x40	=0x40	\b, no clamping required
>>>>>15		byte&0x40	=0x00	\b, decoders should clamp
#>0  string  x		we got %s
#>>&(4.l+4)  use riff-walk

# AVI section extended by Patrik Radman <patrik+file-magic@iki.fi>
#
0	string		RIFF		RIFF (little-endian) data
# RIFF Palette format
# Update: Joerg Jenderek
# URL: https://en.wikipedia.org/wiki/Resource_Interchange_File_Format
# Reference: https://worms2d.info/Palette_file
>8	string		PAL\ 		\b, palette
!:mime	application/x-riff
# color palette by Microsoft Corporation
!:ext	pal
# file size =  chunk size + 8 in most cases
>>4	ulelong+8	x		\b, %u bytes
# Extended PAL Format
>>12	string		plth		\b, extended
# Simple PAL Format
>>12	string		data		
# data chunk size = color entries * 4 + 4 + sometimes extra (4) appended bytes
>>>16	ulelong		x		\b, data size %u
# palVersion is always 0x0300
#>>>20	leshort		x		\b, version 0x%4.4x
# palNumEntries specifies the number of palette color entries
>>>22	uleshort	x		\b, %u entries
# after palPalEntry sized (number of color entries * 4 ) vector
>>>(22.s*4)	ubequad	x		
# jump relative 22 ( 8 + 16) bytes forward points after end of file or to
# appended extra bytes like in http://safecolours.rigdenage.com/set(ms).zip/Protan(MS).pal
>>>>&16		ubelong	x		\b, extra bytes
>>>>>&-4	ubelong	>0		0x%8.8x
# RIFF Device Independent Bitmap format
>8	string		RDIB		\b, device-independent bitmap
>>16	string		BM
>>>30	leshort		12		\b, OS/2 1.x format
>>>>34	leshort		x		\b, %d x
>>>>36	leshort		x		%d
>>>30	leshort		64		\b, OS/2 2.x format
>>>>34	leshort		x		\b, %d x
>>>>36	leshort		x		%d
>>>30	leshort		40		\b, Windows 3.x format
>>>>34	lelong		x		\b, %d x
>>>>38	lelong		x		%d x
>>>>44	leshort		x		%d
# RIFF MIDI format
>8	string		RMID		\b, MIDI
# RIFF Multimedia Movie File format
>8	string		RMMP		\b, multimedia movie
# RIFF wrapper for MP3
>8	string		RMP3		\b, MPEG Layer 3 audio
# Microsoft WAVE format (*.wav)
>8	string		WAVE		\b, WAVE audio
!:mime	audio/x-wav
>>12    string  >\0
>>>12   use     riff-walk
# Update:	Joerg Jenderek
# lower case for Corel Draw version 8 Bidi
>8	string/c	cdr
# skip Corel CCX Clipart
>>8	string		!CDRXcont
# Corel Draw Picture
>>>0	use     corel-draw
# URL:		http://fileformats.archiveteam.org/wiki/CCX_(Corel)
# Reference:	http://mark0.net/download/triddefs_xml.7z/defs/c/ccx-corel.trid.xml 
>>8	string		=CDRXcont	\b, Corel Clipart
!:mime	application/x-corel-ccx
!:ext	ccx
# 3rd chunk data {Corel\040Binary\040Meta\040File}
#>>>20	string		x		\b, 3rd '%-s'
>>>4	ulelong+8	x		\b, %u bytes
# From:		Joerg Jenderek
# URL:		https://en.wikipedia.org/wiki/CorelDRAW
# Reference:	http://fileformats.archiveteam.org/wiki/CorelDRAW
# Picture templates created by newer software start with RIFF type CDT
>8	string		CDT
>>0	use		corel-draw
# Picture templates with version 4.4
>8	string		CDST
>>0	use		corel-draw
# pattern created by newer software start with RIFF type PAT
>8	string		PAT
>>0	use		corel-draw
>8	string		NUNDROOT	\b, Steinberg CuBase
# AVI == Audio Video Interleave
>8	string		AVI\040		\b, AVI
!:mime	video/x-msvideo
>>12    string          LIST
>>>20   string          hdrlavih
>>>>&36 lelong          x               \b, %u x
>>>>&40 lelong          x               %u,
>>>>&4  lelong          >1000000        <1 fps,
>>>>&4  lelong          1000000         1.00 fps,
>>>>&4  lelong          500000          2.00 fps,
>>>>&4  lelong          333333          3.00 fps,
>>>>&4  lelong          250000          4.00 fps,
>>>>&4  lelong          200000          5.00 fps,
>>>>&4  lelong          166667          6.00 fps,
>>>>&4  lelong          142857          7.00 fps,
>>>>&4  lelong          125000          8.00 fps,
>>>>&4  lelong          111111          9.00 fps,
>>>>&4  lelong          100000          10.00 fps,
# ]9.9,10.1[
>>>>&4  lelong          <101010
>>>>>&-4        lelong  >99010
>>>>>>&-4       lelong  !100000         ~10 fps,
>>>>&4  lelong          83333           12.00 fps,
# ]11.9,12.1[
>>>>&4  lelong          <84034
>>>>>&-4        lelong  >82645
>>>>>>&-4       lelong  !83333          ~12 fps,
>>>>&4  lelong          66667           15.00 fps,
# ]14.9,15.1[
>>>>&4  lelong          <67114
>>>>>&-4        lelong  >66225
>>>>>>&-4       lelong  !66667          ~15 fps,
>>>>&4  lelong          50000           20.00 fps,
>>>>&4  lelong          41708           23.98 fps,
>>>>&4  lelong          41667           24.00 fps,
# ]23.9,24.1[
>>>>&4  lelong          <41841
>>>>>&-4        lelong  >41494
>>>>>>&-4       lelong  !41708
>>>>>>>&-4      lelong  !41667          ~24 fps,
>>>>&4  lelong          40000           25.00 fps,
# ]24.9,25.1[
>>>>&4  lelong          <40161
>>>>>&-4        lelong  >39841
>>>>>>&-4       lelong  !40000          ~25 fps,
>>>>&4  lelong          33367           29.97 fps,
>>>>&4  lelong          33333           30.00 fps,
# ]29.9,30.1[
>>>>&4  lelong          <33445
>>>>>&-4        lelong  >33223
>>>>>>&-4       lelong  !33367
>>>>>>>&-4      lelong  !33333          ~30 fps,
>>>>&4  lelong          <32224          >30 fps,
##>>>>&4  lelong          x               (%lu)
##>>>>&20 lelong          x               %lu frames,
# Note: The tests below assume that the AVI has 1 or 2 streams,
#       "vids" optionally followed by "auds".
#       (Should cover 99.9% of all AVIs.)
# assuming avih length = 56
>>>88   string  LIST
>>>>96  string  strlstrh
>>>>>108        string  vids    video:
>>>>>>&0        lelong  0               uncompressed
# skip past vids strh
>>>>>>(104.l+108)       string  strf
>>>>>>>(104.l+132)      lelong          1       RLE 8bpp
>>>>>>>(104.l+132)      string/c        cvid    Cinepak
>>>>>>>(104.l+132)      string/c        i263    Intel I.263
>>>>>>>(104.l+132)      string/c        iv32    Indeo 3.2
>>>>>>>(104.l+132)      string/c        iv41    Indeo 4.1
>>>>>>>(104.l+132)      string/c        iv50    Indeo 5.0
>>>>>>>(104.l+132)      string/c        mp42    Microsoft MPEG-4 v2
>>>>>>>(104.l+132)      string/c        mp43    Microsoft MPEG-4 v3
>>>>>>>(104.l+132)      string/c        fmp4    FFMpeg MPEG-4
>>>>>>>(104.l+132)      string/c        mjpg    Motion JPEG
>>>>>>>(104.l+132)      string/c        div3    DivX 3
>>>>>>>>112             string/c        div3    Low-Motion
>>>>>>>>112             string/c        div4    Fast-Motion
>>>>>>>(104.l+132)      string/c        divx    DivX 4
>>>>>>>(104.l+132)      string/c        dx50    DivX 5
>>>>>>>(104.l+132)      string/c        xvid    XviD
>>>>>>>(104.l+132)	string/c	h264	H.264
>>>>>>>(104.l+132)      string/c        wmv3    Windows Media Video 9
>>>>>>>(104.l+132)      string/c        h264    X.264 or H.264
>>>>>>>(104.l+132)      lelong  0
##>>>>>>>(104.l+132)      string  x       (%.4s)
# skip past first (video) LIST
>>>>(92.l+96)   string  LIST
>>>>>(92.l+104) string  strlstrh
>>>>>>(92.l+116)        string          auds    \b, audio:
# auds strh length = 56:
>>>>>>>(92.l+172)       string          strf
>>>>>>>>(92.l+180)      leshort 0x0001  uncompressed PCM
>>>>>>>>(92.l+180)      leshort 0x0002  ADPCM
>>>>>>>>(92.l+180)      leshort 0x0006  aLaw
>>>>>>>>(92.l+180)      leshort 0x0007  uLaw
>>>>>>>>(92.l+180)      leshort 0x0050  MPEG-1 Layer 1 or 2
>>>>>>>>(92.l+180)      leshort 0x0055  MPEG-1 Layer 3
>>>>>>>>(92.l+180)      leshort 0x2000  Dolby AC3
>>>>>>>>(92.l+180)      leshort 0x0161  DivX
##>>>>>>>>(92.l+180)      leshort x       (0x%.4x)
>>>>>>>>(92.l+182)      leshort 1       (mono,
>>>>>>>>(92.l+182)      leshort 2       (stereo,
>>>>>>>>(92.l+182)      leshort >2      (%d channels,
>>>>>>>>(92.l+184)      lelong  x       %d Hz)
# auds strh length = 64:
>>>>>>>(92.l+180)       string          strf
>>>>>>>>(92.l+188)      leshort 0x0001  uncompressed PCM
>>>>>>>>(92.l+188)      leshort 0x0002  ADPCM
>>>>>>>>(92.l+188)      leshort 0x0055  MPEG-1 Layer 3
>>>>>>>>(92.l+188)      leshort 0x2000  Dolby AC3
>>>>>>>>(92.l+188)      leshort 0x0161  DivX
##>>>>>>>>(92.l+188)      leshort x       (0x%.4x)
>>>>>>>>(92.l+190)      leshort 1       (mono,
>>>>>>>>(92.l+190)      leshort 2       (stereo,
>>>>>>>>(92.l+190)      leshort >2      (%d channels,
>>>>>>>>(92.l+192)      lelong  x       %d Hz)
# Animated Cursor format
>8	string		ACON		\b, animated cursor
# SoundFont 2 <mpruett@sgi.com>
>8	string		sfbk		SoundFont/Bank
# MPEG-1 wrapped in a RIFF, apparently
>8      string          CDXA            \b, wrapped MPEG-1 (CDXA)
>8	string		4XMV		\b, 4X Movie file
# AMV-type AVI file: https://wiki.multimedia.cx/index.php?title=AMV
>8	string		AMV\040		\b, AMV
>8      string          WEBP            \b, Web/P image
!:mime	image/webp
>>12	use		riff-walk
# From:		Joerg Jenderek
# URL:		https://en.wikipedia.org/wiki/CorelDRAW
# Reference:	http://fileformats.archiveteam.org/wiki/CorelDRAW
# Note:		Since version 3 CorelDraw Pictures are RIFF based
# but data chunks remain proprietary.
# Since version 14 til 15 packed as "content/riffData.cdr" and
# since 16 "content/root.dat" in ZIP container
# TODO:		distinguish templates with version 12.5 from Designer illustration 12
#	display information of RIFF based Corel Draw pictures, templates and patterns
0	name   	corel-draw
# display second chunk for debugging
#>8	string		x		\b, [8]=%.8s
>0	string		x		\b, Corel Draw
#!:mime	image/x-coreldraw
!:mime	application/vnd.corel-draw
# used by newer pictures templates
>>8	string		CDT
# used by templates with newer versions since 16
>>>12	string		=fver		Picture template (root.dat)
!:ext	dat
# used by templates with older versions with vrsn tag
>>>12	string		!fver
# used by templates with older versions 14-15
>>>>11	string		>E		Picture template (riffData.cdr)
!:ext	cdr
# used by templates with older versions 11-13
>>>>11	string		<F		Picture template
!:ext	cdt/cdrt
# used by older templates with version 4.4
>>8	string		CDST		Picture template
!:ext	cdt
# used by templates with version 12.5
>>8	string		DESC		Picture template
!:ext	cdt
# used by newer patterns with version 22
>>8	string		PAT		Pattern
!:ext	dat
# remaining older templates, patterns, drawings
>>8	default		x
# pattern with old version 4.y
>>>26	ulelong		=0x0000206C	Pattern
!:ext	pat
# pattern with newer versions
>>>26	ulelong		=0x00000D2C	Pattern
!:ext	pat
# remaining older templates or pictures
>>>26	default		x
# used by older versions 5 - 15
>>>>12	string		=vrsn
# 4th chunk size unequal 282Ch only found for CDR
>>>>>26	ulelong		!0x0000282c	Picture
!:ext	cdr
>>>>>26	default		x		Picture or template
!:ext	cdr/cdt
# used by newer versions since 16
>>>>12	string		=fver		Picture (root.dat)
!:ext	dat
# version marked by 1 ASCII char: space~3, ... , F~15,  ... , N~22, ... R~22 template
>11	string		x		\b, version
>11	string		>\040		'%-.1s'
>0	use		corel-version
>4	ulelong+8	x		\b, %u bytes
#
#	display numeric version of RIFF based Corel after 3rd RIFF tag
0	name   	corel-version
# for debugging purpose; vrsn for short content; fver for 16 byte size
#>12	string		x		\b, TAG "%-4.4s"
# 1st data chunk length 2 implies short content version
>16	ulelong		2
# vrsn chunk short content interpreted by MajorVersion * 100 + MinorVersion
>>20	uleshort/100	x		%u
>>20	uleshort%100	>0		\b.%u
# for debugging purpose display next chunk like: DISP LIST
#>>22	string		x		\b, 4th "%-4.4s"
#>>26	ulelong		x		\b, 4th SIZE 0x%x
# for debugging purpose display 5th chunk like: LIST DISP ccmm osfp
#>>(26.l+30)	string	x		\b, 5th "%-4.4s"
# 1st data chunk length 10h implies 16 byte content with version info
>16	ulelong		0x10
>>34	ubyte		x		%u
>>>33	ubyte		>0		\b.%u
#
# XXX - some of the below may only appear in little-endian form.
#
# Also "MV93" appears to be for one form of Macromedia Director
# files, and "GDMF" appears to be another multimedia format.
#
0	string		RIFX		RIFF (big-endian) data
# RIFF Palette format
>8	string		PAL		\b, palette
>>16	beshort		x		\b, version %d
>>18	beshort		x		\b, %d entries
# RIFF Device Independent Bitmap format
>8	string		RDIB		\b, device-independent bitmap
>>16	string		BM
>>>30	beshort		12		\b, OS/2 1.x format
>>>>34	beshort		x		\b, %d x
>>>>36	beshort		x		%d
>>>30	beshort		64		\b, OS/2 2.x format
>>>>34	beshort		x		\b, %d x
>>>>36	beshort		x		%d
>>>30	beshort		40		\b, Windows 3.x format
>>>>34	belong		x		\b, %d x
>>>>38	belong		x		%d x
>>>>44	beshort		x		%d
# RIFF MIDI format
>8	string		RMID		\b, MIDI
# RIFF Multimedia Movie File format
>8	string		RMMP		\b, multimedia movie
# Microsoft WAVE format (*.wav)
>8	string		WAVE		\b, WAVE audio
>>20	leshort		1		\b, Microsoft PCM
>>>34	leshort		>0		\b, %d bit
>>22	beshort		=1		\b, mono
>>22	beshort		=2		\b, stereo
>>22	beshort		>2		\b, %d channels
>>24	belong		>0		%d Hz
# Corel Draw Picture big endian not tested by real examples
#>8	string		CDRA		\b, Corel Draw Picture
#>8	string		CDR6		\b, Corel Draw Picture, version 6
>8	string		CDR
>>0	use     \^corel-draw

# AVI == Audio Video Interleave
>8	string		AVI\040		\b, AVI
# Animated Cursor format
>8	string		ACON		\b, animated cursor
# Notation Interchange File Format (big-endian only)
>8	string		NIFF		\b, Notation Interchange File Format
# SoundFont 2 <mpruett@sgi.com>
>8	string		sfbk		SoundFont/Bank

#------------------------------------------------------------------------------
# Sony Wave64
# see http://www.vcs.de/fileadmin/user_upload/MBS/PDF/Whitepaper/Informations_about_Sony_Wave64.pdf
# 128 bit RIFF-GUID { 66666972-912E-11CF-A5D6-28DB04C10000 } in little-endian
0	string	riff\x2E\x91\xCF\x11\xA5\xD6\x28\xDB\x04\xC1\x00\x00		Sony Wave64 RIFF data
# 128 bit + total file size (64 bits) so 24 bytes
# then WAVE-GUID { 65766177-ACF3-11D3-8CD1-00C04F8EDB8A }
>24	string		wave\xF3\xAC\xD3\x11\x8C\xD1\x00\xC0\x4F\x8E\xDB\x8A		\b, WAVE 64 audio
!:mime	audio/x-w64
# FMT-GUID { 20746D66-ACF3-11D3-8CD1-00C04F8EDB8A }
>>40	search/256	fmt\x20\xF3\xAC\xD3\x11\x8C\xD1\x00\xC0\x4F\x8E\xDB\x8A		\b
>>>&10	leshort		=1		\b, mono
>>>&10	leshort		=2		\b, stereo
>>>&10	leshort		>2		\b, %d channels
>>>&12	lelong		>0		%d Hz

#------------------------------------------------------------------------------
# MBWF/RF64
# see EBU TECH 3306 https://tech.ebu.ch/docs/tech/tech3306-2009.pdf
0	string	RF64\xff\xff\xff\xffWAVEds64		MBWF/RF64 audio
!:mime	audio/x-wav
>40	search/256	fmt\x20		\b
>>&6	leshort		=1		\b, mono
>>&6	leshort		=2		\b, stereo
>>&6	leshort		>2		\b, %d channels
>>&8	lelong		>0		%d Hz

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