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  1. 

  2. #------------------------------------------------------------------------------
    3. 

  3. # $File: riff,v 1.34 2019/04/19 00:42:27 christos Exp $
    4. 

  4. # riff:  file(1) magic for RIFF format
    5. 

  5. # See
    6. 

  6. #
    7. 

  7. #	https://www.seanet.com/users/matts/riffmci/riffmci.htm
    8. 

  8. #	http://www-mmsp.ece.mcgill.ca/Documents/AudioFormats/WAVE/Docs/riffmci.pdf
    9. 

  9. #
    10. 

  10. 

  11. # audio format tag. Assume limits: max 1024 bit, 128 channels, 1 MHz
    12. 

  12. 0   name    riff-wave
    13. 

  13. >0	leshort		1		\b, Microsoft PCM
    14. 

  14. >>14	leshort		>0
    15. 

  15. >>>14	leshort		<1024	\b, %d bit
    16. 

  16. >0	leshort		2		\b, Microsoft ADPCM
    17. 

  17. >0	leshort		6		\b, ITU G.711 A-law
    18. 

  18. >0	leshort		7		\b, ITU G.711 mu-law
    19. 

  19. >0	leshort		8		\b, Microsoft DTS
    20. 

  20. >0	leshort		17		\b, IMA ADPCM
    21. 

  21. >0	leshort		20		\b, ITU G.723 ADPCM (Yamaha)
    22. 

  22. >0	leshort		49		\b, GSM 6.10
    23. 

  23. >0	leshort		64		\b, ITU G.721 ADPCM
    24. 

  24. >0	leshort		80		\b, MPEG
    25. 

  25. >0	leshort		85		\b, MPEG Layer 3
    26. 

  26. >0	leshort		0x2001		\b, DTS
    27. 

  27. >2	leshort		=1		\b, mono
    28. 

  28. >2	leshort		=2		\b, stereo
    29. 

  29. >2	leshort		>2
    30. 

  30. >>2	leshort		<128	\b, %d channels
    31. 

  31. >4	lelong		>0
    32. 

  32. >>4	lelong		<1000000	%d Hz
    33. 

  33. 

  34. # try to find "fmt "
    35. 

  35. 0   name    riff-walk
    36. 

  36. >0  string  fmt\x20
    37. 

  37. >>4 lelong  <0x80
    38. 

  38. >>>8 use    riff-wave
    39. 

  39. >0  string  LIST
    40. 

  40. >>&(4.l+4)  use riff-walk
    41. 

  41. >0  string  DISP
    42. 

  42. >>&(4.l+4)  use riff-walk
    43. 

  43. >0  string  bext
    44. 

  44. >>&(4.l+4)  use riff-walk
    45. 

  45. >0  string  Fake
    46. 

  46. >>&(4.l+4)  use riff-walk
    47. 

  47. >0  string  fact
    48. 

  48. >>&(4.l+4)  use riff-walk
    49. 

  49. >0  string  VP8
    50. 

  50. >>11		byte		0x9d
    51. 

  51. >>>12		byte		0x01
    52. 

  52. >>>>13		byte		0x2a	\b, VP8 encoding
    53. 

  53. >>>>>14		leshort&0x3fff	x	\b, %d
    54. 

  54. >>>>>16		leshort&0x3fff	x	\bx%d, Scaling:
    55. 

  55. >>>>>14		leshort&0xc000	0x0000	\b [none]
    56. 

  56. >>>>>14		leshort&0xc000	0x1000	\b [5/4]
    57. 

  57. >>>>>14		leshort&0xc000	0x2000	\b [5/3]
    58. 

  58. >>>>>14		leshort&0xc000	0x3000	\b [2]
    59. 

  59. >>>>>14		leshort&0xc000	0x0000	\bx[none]
    60. 

  60. >>>>>14		leshort&0xc000	0x1000	\bx[5/4]
    61. 

  61. >>>>>14		leshort&0xc000	0x2000	\bx[5/3]
    62. 

  62. >>>>>14		leshort&0xc000	0x3000	\bx[2]
    63. 

  63. >>>>>15		byte&0x80	=0x00	\b, YUV color
    64. 

  64. >>>>>15		byte&0x80	=0x80	\b, bad color specification
    65. 

  65. >>>>>15		byte&0x40	=0x40	\b, no clamping required
    66. 

  66. >>>>>15		byte&0x40	=0x00	\b, decoders should clamp
    67. 

  67. #>0  string  x		we got %s
    68. 

  68. #>>&(4.l+4)  use riff-walk
    69. 

  69. 

  70. # AVI section extended by Patrik Radman <patrik+file-magic@iki.fi>
    71. 

  71. #
    72. 

  72. 0	string		RIFF		RIFF (little-endian) data
    73. 

  73. # RIFF Palette format
    74. 

  74. # Update: Joerg Jenderek
    75. 

  75. # URL: https://en.wikipedia.org/wiki/Resource_Interchange_File_Format
    76. 

  76. # Reference: https://worms2d.info/Palette_file
    77. 

  77. >8	string		PAL\ 		\b, palette
    78. 

  78. !:mime	application/x-riff
    79. 

  79. # color palette by Microsoft Corporation
    80. 

  80. !:ext	pal
    81. 

  81. # file size =  chunk size + 8 in most cases
    82. 

  82. >>4	ulelong+8	x		\b, %u bytes
    83. 

  83. # Extended PAL Format
    84. 

  84. >>12	string		plth		\b, extended
    85. 

  85. # Simple PAL Format
    86. 

  86. >>12	string		data		
    87. 

  87. # data chunk size = color entries * 4 + 4 + sometimes extra (4) appended bytes
    88. 

  88. >>>16	ulelong		x		\b, data size %u
    89. 

  89. # palVersion is always 0x0300
    90. 

  90. #>>>20	leshort		x		\b, version 0x%4.4x
    91. 

  91. # palNumEntries specifies the number of palette color entries
    92. 

  92. >>>22	uleshort	x		\b, %u entries
    93. 

  93. # after palPalEntry sized (number of color entries * 4 ) vector
    94. 

  94. >>>(22.s*4)	ubequad	x		
    95. 

  95. # jump relative 22 ( 8 + 16) bytes forward points after end of file or to
    96. 

  96. # appended extra bytes like in http://safecolours.rigdenage.com/set(ms).zip/Protan(MS).pal
    97. 

  97. >>>>&16		ubelong	x		\b, extra bytes
    98. 

  98. >>>>>&-4	ubelong	>0		0x%8.8x
    99. 

  99. # RIFF Device Independent Bitmap format
    100. 

  100. >8	string		RDIB		\b, device-independent bitmap
    101. 

  101. >>16	string		BM
    102. 

  102. >>>30	leshort		12		\b, OS/2 1.x format
    103. 

  103. >>>>34	leshort		x		\b, %d x
    104. 

  104. >>>>36	leshort		x		%d
    105. 

  105. >>>30	leshort		64		\b, OS/2 2.x format
    106. 

  106. >>>>34	leshort		x		\b, %d x
    107. 

  107. >>>>36	leshort		x		%d
    108. 

  108. >>>30	leshort		40		\b, Windows 3.x format
    109. 

  109. >>>>34	lelong		x		\b, %d x
    110. 

  110. >>>>38	lelong		x		%d x
    111. 

  111. >>>>44	leshort		x		%d
    112. 

  112. # RIFF MIDI format
    113. 

  113. >8	string		RMID		\b, MIDI
    114. 

  114. # RIFF Multimedia Movie File format
    115. 

  115. >8	string		RMMP		\b, multimedia movie
    116. 

  116. # RIFF wrapper for MP3
    117. 

  117. >8	string		RMP3		\b, MPEG Layer 3 audio
    118. 

  118. # Microsoft WAVE format (*.wav)
    119. 

  119. >8	string		WAVE		\b, WAVE audio
    120. 

  120. !:mime	audio/x-wav
    121. 

  121. >>12    string  >\0
    122. 

  122. >>>12   use     riff-walk
    123. 

  123. # Corel Draw Picture
    124. 

  124. >8	string		CDRA		\b, Corel Draw Picture
    125. 

  125. !:mime	image/x-coreldraw
    126. 

  126. >8	string		CDR6		\b, Corel Draw Picture, version 6
    127. 

  127. !:mime	image/x-coreldraw
    128. 

  128. >8	string		NUNDROOT	\b, Steinberg CuBase
    129. 

  129. # AVI == Audio Video Interleave
    130. 

  130. >8	string		AVI\040		\b, AVI
    131. 

  131. !:mime	video/x-msvideo
    132. 

  132. >>12    string          LIST
    133. 

  133. >>>20   string          hdrlavih
    134. 

  134. >>>>&36 lelong          x               \b, %u x
    135. 

  135. >>>>&40 lelong          x               %u,
    136. 

  136. >>>>&4  lelong          >1000000        <1 fps,
    137. 

  137. >>>>&4  lelong          1000000         1.00 fps,
    138. 

  138. >>>>&4  lelong          500000          2.00 fps,
    139. 

  139. >>>>&4  lelong          333333          3.00 fps,
    140. 

  140. >>>>&4  lelong          250000          4.00 fps,
    141. 

  141. >>>>&4  lelong          200000          5.00 fps,
    142. 

  142. >>>>&4  lelong          166667          6.00 fps,
    143. 

  143. >>>>&4  lelong          142857          7.00 fps,
    144. 

  144. >>>>&4  lelong          125000          8.00 fps,
    145. 

  145. >>>>&4  lelong          111111          9.00 fps,
    146. 

  146. >>>>&4  lelong          100000          10.00 fps,
    147. 

  147. # ]9.9,10.1[
    148. 

  148. >>>>&4  lelong          <101010
    149. 

  149. >>>>>&-4        lelong  >99010
    150. 

  150. >>>>>>&-4       lelong  !100000         ~10 fps,
    151. 

  151. >>>>&4  lelong          83333           12.00 fps,
    152. 

  152. # ]11.9,12.1[
    153. 

  153. >>>>&4  lelong          <84034
    154. 

  154. >>>>>&-4        lelong  >82645
    155. 

  155. >>>>>>&-4       lelong  !83333          ~12 fps,
    156. 

  156. >>>>&4  lelong          66667           15.00 fps,
    157. 

  157. # ]14.9,15.1[
    158. 

  158. >>>>&4  lelong          <67114
    159. 

  159. >>>>>&-4        lelong  >66225
    160. 

  160. >>>>>>&-4       lelong  !66667          ~15 fps,
    161. 

  161. >>>>&4  lelong          50000           20.00 fps,
    162. 

  162. >>>>&4  lelong          41708           23.98 fps,
    163. 

  163. >>>>&4  lelong          41667           24.00 fps,
    164. 

  164. # ]23.9,24.1[
    165. 

  165. >>>>&4  lelong          <41841
    166. 

  166. >>>>>&-4        lelong  >41494
    167. 

  167. >>>>>>&-4       lelong  !41708
    168. 

  168. >>>>>>>&-4      lelong  !41667          ~24 fps,
    169. 

  169. >>>>&4  lelong          40000           25.00 fps,
    170. 

  170. # ]24.9,25.1[
    171. 

  171. >>>>&4  lelong          <40161
    172. 

  172. >>>>>&-4        lelong  >39841
    173. 

  173. >>>>>>&-4       lelong  !40000          ~25 fps,
    174. 

  174. >>>>&4  lelong          33367           29.97 fps,
    175. 

  175. >>>>&4  lelong          33333           30.00 fps,
    176. 

  176. # ]29.9,30.1[
    177. 

  177. >>>>&4  lelong          <33445
    178. 

  178. >>>>>&-4        lelong  >33223
    179. 

  179. >>>>>>&-4       lelong  !33367
    180. 

  180. >>>>>>>&-4      lelong  !33333          ~30 fps,
    181. 

  181. >>>>&4  lelong          <32224          >30 fps,
    182. 

  182. ##>>>>&4  lelong          x               (%lu)
    183. 

  183. ##>>>>&20 lelong          x               %lu frames,
    184. 

  184. # Note: The tests below assume that the AVI has 1 or 2 streams,
    185. 

  185. #       "vids" optionally followed by "auds".
    186. 

  186. #       (Should cover 99.9% of all AVIs.)
    187. 

  187. # assuming avih length = 56
    188. 

  188. >>>88   string  LIST
    189. 

  189. >>>>96  string  strlstrh
    190. 

  190. >>>>>108        string  vids    video:
    191. 

  191. >>>>>>&0        lelong  0               uncompressed
    192. 

  192. # skip past vids strh
    193. 

  193. >>>>>>(104.l+108)       string  strf
    194. 

  194. >>>>>>>(104.l+132)      lelong          1       RLE 8bpp
    195. 

  195. >>>>>>>(104.l+132)      string/c        cvid    Cinepak
    196. 

  196. >>>>>>>(104.l+132)      string/c        i263    Intel I.263
    197. 

  197. >>>>>>>(104.l+132)      string/c        iv32    Indeo 3.2
    198. 

  198. >>>>>>>(104.l+132)      string/c        iv41    Indeo 4.1
    199. 

  199. >>>>>>>(104.l+132)      string/c        iv50    Indeo 5.0
    200. 

  200. >>>>>>>(104.l+132)      string/c        mp42    Microsoft MPEG-4 v2
    201. 

  201. >>>>>>>(104.l+132)      string/c        mp43    Microsoft MPEG-4 v3
    202. 

  202. >>>>>>>(104.l+132)      string/c        fmp4    FFMpeg MPEG-4
    203. 

  203. >>>>>>>(104.l+132)      string/c        mjpg    Motion JPEG
    204. 

  204. >>>>>>>(104.l+132)      string/c        div3    DivX 3
    205. 

  205. >>>>>>>>112             string/c        div3    Low-Motion
    206. 

  206. >>>>>>>>112             string/c        div4    Fast-Motion
    207. 

  207. >>>>>>>(104.l+132)      string/c        divx    DivX 4
    208. 

  208. >>>>>>>(104.l+132)      string/c        dx50    DivX 5
    209. 

  209. >>>>>>>(104.l+132)      string/c        xvid    XviD
    210. 

  210. >>>>>>>(104.l+132)	string/c	h264	H.264
    211. 

  211. >>>>>>>(104.l+132)      string/c        wmv3    Windows Media Video 9
    212. 

  212. >>>>>>>(104.l+132)      string/c        h264    X.264 or H.264
    213. 

  213. >>>>>>>(104.l+132)      lelong  0
    214. 

  214. ##>>>>>>>(104.l+132)      string  x       (%.4s)
    215. 

  215. # skip past first (video) LIST
    216. 

  216. >>>>(92.l+96)   string  LIST
    217. 

  217. >>>>>(92.l+104) string  strlstrh
    218. 

  218. >>>>>>(92.l+116)        string          auds    \b, audio:
    219. 

  219. # auds strh length = 56:
    220. 

  220. >>>>>>>(92.l+172)       string          strf
    221. 

  221. >>>>>>>>(92.l+180)      leshort 0x0001  uncompressed PCM
    222. 

  222. >>>>>>>>(92.l+180)      leshort 0x0002  ADPCM
    223. 

  223. >>>>>>>>(92.l+180)      leshort 0x0006  aLaw
    224. 

  224. >>>>>>>>(92.l+180)      leshort 0x0007  uLaw
    225. 

  225. >>>>>>>>(92.l+180)      leshort 0x0050  MPEG-1 Layer 1 or 2
    226. 

  226. >>>>>>>>(92.l+180)      leshort 0x0055  MPEG-1 Layer 3
    227. 

  227. >>>>>>>>(92.l+180)      leshort 0x2000  Dolby AC3
    228. 

  228. >>>>>>>>(92.l+180)      leshort 0x0161  DivX
    229. 

  229. ##>>>>>>>>(92.l+180)      leshort x       (0x%.4x)
    230. 

  230. >>>>>>>>(92.l+182)      leshort 1       (mono,
    231. 

  231. >>>>>>>>(92.l+182)      leshort 2       (stereo,
    232. 

  232. >>>>>>>>(92.l+182)      leshort >2      (%d channels,
    233. 

  233. >>>>>>>>(92.l+184)      lelong  x       %d Hz)
    234. 

  234. # auds strh length = 64:
    235. 

  235. >>>>>>>(92.l+180)       string          strf
    236. 

  236. >>>>>>>>(92.l+188)      leshort 0x0001  uncompressed PCM
    237. 

  237. >>>>>>>>(92.l+188)      leshort 0x0002  ADPCM
    238. 

  238. >>>>>>>>(92.l+188)      leshort 0x0055  MPEG-1 Layer 3
    239. 

  239. >>>>>>>>(92.l+188)      leshort 0x2000  Dolby AC3
    240. 

  240. >>>>>>>>(92.l+188)      leshort 0x0161  DivX
    241. 

  241. ##>>>>>>>>(92.l+188)      leshort x       (0x%.4x)
    242. 

  242. >>>>>>>>(92.l+190)      leshort 1       (mono,
    243. 

  243. >>>>>>>>(92.l+190)      leshort 2       (stereo,
    244. 

  244. >>>>>>>>(92.l+190)      leshort >2      (%d channels,
    245. 

  245. >>>>>>>>(92.l+192)      lelong  x       %d Hz)
    246. 

  246. # Animated Cursor format
    247. 

  247. >8	string		ACON		\b, animated cursor
    248. 

  248. # SoundFont 2 <mpruett@sgi.com>
    249. 

  249. >8	string		sfbk		SoundFont/Bank
    250. 

  250. # MPEG-1 wrapped in a RIFF, apparently
    251. 

  251. >8      string          CDXA            \b, wrapped MPEG-1 (CDXA)
    252. 

  252. >8	string		4XMV		\b, 4X Movie file
    253. 

  253. # AMV-type AVI file: https://wiki.multimedia.cx/index.php?title=AMV
    254. 

  254. >8	string		AMV\040		\b, AMV
    255. 

  255. >8      string          WEBP            \b, Web/P image
    256. 

  256. !:mime	image/webp
    257. 

  257. >>12	use		riff-walk
    258. 

  258. 

  259. #
    260. 

  260. # XXX - some of the below may only appear in little-endian form.
    261. 

  261. #
    262. 

  262. # Also "MV93" appears to be for one form of Macromedia Director
    263. 

  263. # files, and "GDMF" appears to be another multimedia format.
    264. 

  264. #
    265. 

  265. 0	string		RIFX		RIFF (big-endian) data
    266. 

  266. # RIFF Palette format
    267. 

  267. >8	string		PAL		\b, palette
    268. 

  268. >>16	beshort		x		\b, version %d
    269. 

  269. >>18	beshort		x		\b, %d entries
    270. 

  270. # RIFF Device Independent Bitmap format
    271. 

  271. >8	string		RDIB		\b, device-independent bitmap
    272. 

  272. >>16	string		BM
    273. 

  273. >>>30	beshort		12		\b, OS/2 1.x format
    274. 

  274. >>>>34	beshort		x		\b, %d x
    275. 

  275. >>>>36	beshort		x		%d
    276. 

  276. >>>30	beshort		64		\b, OS/2 2.x format
    277. 

  277. >>>>34	beshort		x		\b, %d x
    278. 

  278. >>>>36	beshort		x		%d
    279. 

  279. >>>30	beshort		40		\b, Windows 3.x format
    280. 

  280. >>>>34	belong		x		\b, %d x
    281. 

  281. >>>>38	belong		x		%d x
    282. 

  282. >>>>44	beshort		x		%d
    283. 

  283. # RIFF MIDI format
    284. 

  284. >8	string		RMID		\b, MIDI
    285. 

  285. # RIFF Multimedia Movie File format
    286. 

  286. >8	string		RMMP		\b, multimedia movie
    287. 

  287. # Microsoft WAVE format (*.wav)
    288. 

  288. >8	string		WAVE		\b, WAVE audio
    289. 

  289. >>20	leshort		1		\b, Microsoft PCM
    290. 

  290. >>>34	leshort		>0		\b, %d bit
    291. 

  291. >>22	beshort		=1		\b, mono
    292. 

  292. >>22	beshort		=2		\b, stereo
    293. 

  293. >>22	beshort		>2		\b, %d channels
    294. 

  294. >>24	belong		>0		%d Hz
    295. 

  295. # Corel Draw Picture
    296. 

  296. >8	string		CDRA		\b, Corel Draw Picture
    297. 

  297. >8	string		CDR6		\b, Corel Draw Picture, version 6
    298. 

  298. # AVI == Audio Video Interleave
    299. 

  299. >8	string		AVI\040		\b, AVI
    300. 

  300. # Animated Cursor format
    301. 

  301. >8	string		ACON		\b, animated cursor
    302. 

  302. # Notation Interchange File Format (big-endian only)
    303. 

  303. >8	string		NIFF		\b, Notation Interchange File Format
    304. 

  304. # SoundFont 2 <mpruett@sgi.com>
    305. 

  305. >8	string		sfbk		SoundFont/Bank
    306. 

  306. 

  307. #------------------------------------------------------------------------------
    308. 

  308. # Sony Wave64
    309. 

  309. # see http://www.vcs.de/fileadmin/user_upload/MBS/PDF/Whitepaper/Informations_about_Sony_Wave64.pdf
    310. 

  310. # 128 bit RIFF-GUID { 66666972-912E-11CF-A5D6-28DB04C10000 } in little-endian
    311. 

  311. 0	string	riff\x2E\x91\xCF\x11\xA5\xD6\x28\xDB\x04\xC1\x00\x00		Sony Wave64 RIFF data
    312. 

  312. # 128 bit + total file size (64 bits) so 24 bytes
    313. 

  313. # then WAVE-GUID { 65766177-ACF3-11D3-8CD1-00C04F8EDB8A }
    314. 

  314. >24	string		wave\xF3\xAC\xD3\x11\x8C\xD1\x00\xC0\x4F\x8E\xDB\x8A		\b, WAVE 64 audio
    315. 

  315. !:mime	audio/x-w64
    316. 

  316. # FMT-GUID { 20746D66-ACF3-11D3-8CD1-00C04F8EDB8A }
    317. 

  317. >>40	search/256	fmt\x20\xF3\xAC\xD3\x11\x8C\xD1\x00\xC0\x4F\x8E\xDB\x8A		\b
    318. 

  318. >>>&10	leshort		=1		\b, mono
    319. 

  319. >>>&10	leshort		=2		\b, stereo
    320. 

  320. >>>&10	leshort		>2		\b, %d channels
    321. 

  321. >>>&12	lelong		>0		%d Hz
    322. 

  322. 

  323. #------------------------------------------------------------------------------
    324. 

  324. # MBWF/RF64
    325. 

  325. # see EBU TECH 3306 https://tech.ebu.ch/docs/tech/tech3306-2009.pdf
    326. 

  326. 0	string	RF64\xff\xff\xff\xffWAVEds64		MBWF/RF64 audio
    327. 

  327. !:mime	audio/x-wav
    328. 

  328. >40	search/256	fmt\x20		\b
    329. 

  329. >>&6	leshort		=1		\b, mono
    330. 

  330. >>&6	leshort		=2		\b, stereo
    331. 

  331. >>&6	leshort		>2		\b, %d channels
    332. 

  332. >>&8	lelong		>0		%d Hz
    333.