riff 7.9 KB

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  1. #------------------------------------------------------------------------------
  2. # riff: file(1) magic for RIFF format
  3. # See
  4. #
  5. # http://www.seanet.com/users/matts/riffmci/riffmci.htm
  6. #
  7. # AVI section extended by Patrik Rådman <patrik+file-magic@iki.fi>
  8. #
  9. 0 string RIFF RIFF (little-endian) data
  10. # RIFF Palette format
  11. >8 string PAL \b, palette
  12. >>16 leshort x \b, version %d
  13. >>18 leshort x \b, %d entries
  14. # RIFF Device Independent Bitmap format
  15. >8 string RDIB \b, device-independent bitmap
  16. >>16 string BM
  17. >>>30 leshort 12 \b, OS/2 1.x format
  18. >>>>34 leshort x \b, %d x
  19. >>>>36 leshort x %d
  20. >>>30 leshort 64 \b, OS/2 2.x format
  21. >>>>34 leshort x \b, %d x
  22. >>>>36 leshort x %d
  23. >>>30 leshort 40 \b, Windows 3.x format
  24. >>>>34 lelong x \b, %d x
  25. >>>>38 lelong x %d x
  26. >>>>44 leshort x %d
  27. # RIFF MIDI format
  28. >8 string RMID \b, MIDI
  29. # RIFF Multimedia Movie File format
  30. >8 string RMMP \b, multimedia movie
  31. # Microsoft WAVE format (*.wav)
  32. >8 string WAVE \b, WAVE audio
  33. >>20 leshort 1 \b, Microsoft PCM
  34. >>>34 leshort >0 \b, %d bit
  35. >>20 leshort 2 \b, Microsoft ADPCM
  36. >>20 leshort 6 \b, ITU G.711 A-law
  37. >>20 leshort 7 \b, ITU G.711 mu-law
  38. >>20 leshort 17 \b, IMA ADPCM
  39. >>20 leshort 20 \b, ITU G.723 ADPCM (Yamaha)
  40. >>20 leshort 49 \b, GSM 6.10
  41. >>20 leshort 64 \b, ITU G.721 ADPCM
  42. >>20 leshort 80 \b, MPEG
  43. >>20 leshort 85 \b, MPEG Layer 3
  44. >>22 leshort =1 \b, mono
  45. >>22 leshort =2 \b, stereo
  46. >>22 leshort >2 \b, %d channels
  47. >>24 lelong >0 %d Hz
  48. # Corel Draw Picture
  49. >8 string CDRA \b, Corel Draw Picture
  50. # AVI == Audio Video Interleave
  51. >8 string AVI\040 \b, AVI
  52. >>12 string LIST
  53. >>>20 string hdrlavih
  54. >>>>&36 lelong x \b, %lu x
  55. >>>>&40 lelong x %lu,
  56. >>>>&4 lelong >1000000 <1 fps,
  57. >>>>&4 lelong 1000000 1.00 fps,
  58. >>>>&4 lelong 500000 2.00 fps,
  59. >>>>&4 lelong 333333 3.00 fps,
  60. >>>>&4 lelong 250000 4.00 fps,
  61. >>>>&4 lelong 200000 5.00 fps,
  62. >>>>&4 lelong 166667 6.00 fps,
  63. >>>>&4 lelong 142857 7.00 fps,
  64. >>>>&4 lelong 125000 8.00 fps,
  65. >>>>&4 lelong 111111 9.00 fps,
  66. >>>>&4 lelong 100000 10.00 fps,
  67. # ]9.9,10.1[
  68. >>>>&4 lelong <101010
  69. >>>>>&-4 lelong >99010
  70. >>>>>>&-4 lelong !100000 ~10 fps,
  71. >>>>&4 lelong 83333 12.00 fps,
  72. # ]11.9,12.1[
  73. >>>>&4 lelong <84034
  74. >>>>>&-4 lelong >82645
  75. >>>>>>&-4 lelong !83333 ~12 fps,
  76. >>>>&4 lelong 66667 15.00 fps,
  77. # ]14.9,15.1[
  78. >>>>&4 lelong <67114
  79. >>>>>&-4 lelong >66225
  80. >>>>>>&-4 lelong !66667 ~15 fps,
  81. >>>>&4 lelong 50000 20.00 fps,
  82. >>>>&4 lelong 41708 23.98 fps,
  83. >>>>&4 lelong 41667 24.00 fps,
  84. # ]23.9,24.1[
  85. >>>>&4 lelong <41841
  86. >>>>>&-4 lelong >41494
  87. >>>>>>&-4 lelong !41708
  88. >>>>>>>&-4 lelong !41667 ~24 fps,
  89. >>>>&4 lelong 40000 25.00 fps,
  90. # ]24.9,25.1[
  91. >>>>&4 lelong <40161
  92. >>>>>&-4 lelong >39841
  93. >>>>>>&-4 lelong !40000 ~25 fps,
  94. >>>>&4 lelong 33367 29.97 fps,
  95. >>>>&4 lelong 33333 30.00 fps,
  96. # ]29.9,30.1[
  97. >>>>&4 lelong <33445
  98. >>>>>&-4 lelong >33223
  99. >>>>>>&-4 lelong !33367
  100. >>>>>>>&-4 lelong !33333 ~30 fps,
  101. >>>>&4 lelong <32224 >30 fps,
  102. ##>>>>&4 lelong x (%lu)
  103. ##>>>>&20 lelong x %lu frames,
  104. # Note: The tests below assume that the AVI has 1 or 2 streams,
  105. # "vids" optionally followed by "auds".
  106. # (Should cover 99.9% of all AVIs.)
  107. # assuming avih length = 56
  108. >>>88 string LIST
  109. >>>>96 string strlstrh
  110. >>>>>108 string vids video:
  111. >>>>>>&0 lelong 0 uncompressed
  112. # skip past vids strh
  113. >>>>>>(104.l+108) string strf
  114. >>>>>>>(104.l+132) lelong 1 RLE 8bpp
  115. >>>>>>>(104.l+132) string/c cvid Cinepak
  116. >>>>>>>(104.l+132) string/c i263 Intel I.263
  117. >>>>>>>(104.l+132) string/c iv32 Indeo 3.2
  118. >>>>>>>(104.l+132) string/c iv41 Indeo 4.1
  119. >>>>>>>(104.l+132) string/c iv50 Indeo 5.0
  120. >>>>>>>(104.l+132) string/c mp42 Microsoft MPEG-4 v2
  121. >>>>>>>(104.l+132) string/c mp43 Microsoft MPEG-4 v3
  122. >>>>>>>(104.l+132) string/c mjpg Motion JPEG
  123. >>>>>>>(104.l+132) string/c div3 DivX 3
  124. >>>>>>>>112 string/c div3 Low-Motion
  125. >>>>>>>>112 string/c div4 Fast-Motion
  126. >>>>>>>(104.l+132) string/c divx DivX 4
  127. >>>>>>>(104.l+132) string/c dx50 DivX 5
  128. >>>>>>>(104.l+132) string/c xvid XviD
  129. >>>>>>>(104.l+132) lelong 0
  130. ##>>>>>>>(104.l+132) string x (%.4s)
  131. # skip past first (video) LIST
  132. >>>>(92.l+96) string LIST
  133. >>>>>(92.l+104) string strlstrh
  134. >>>>>>(92.l+116) string auds \b, audio:
  135. # auds strh length = 56:
  136. >>>>>>>(92.l+172) string strf
  137. >>>>>>>>(92.l+180) leshort 0x0001 uncompressed PCM
  138. >>>>>>>>(92.l+180) leshort 0x0002 ADPCM
  139. >>>>>>>>(92.l+180) leshort 0x0055 MPEG-1 Layer 3
  140. >>>>>>>>(92.l+180) leshort 0x2000 Dolby AC3
  141. >>>>>>>>(92.l+180) leshort 0x0161 DivX
  142. ##>>>>>>>>(92.l+180) leshort x (0x%.4x)
  143. >>>>>>>>(92.l+182) leshort 1 (mono,
  144. >>>>>>>>(92.l+182) leshort 2 (stereo,
  145. >>>>>>>>(92.l+182) leshort >2 (%d channels,
  146. >>>>>>>>(92.l+184) lelong x %d Hz)
  147. # auds strh length = 64:
  148. >>>>>>>(92.l+180) string strf
  149. >>>>>>>>(92.l+188) leshort 0x0001 uncompressed PCM
  150. >>>>>>>>(92.l+188) leshort 0x0002 ADPCM
  151. >>>>>>>>(92.l+188) leshort 0x0055 MPEG-1 Layer 3
  152. >>>>>>>>(92.l+188) leshort 0x2000 Dolby AC3
  153. >>>>>>>>(92.l+188) leshort 0x0161 DivX
  154. ##>>>>>>>>(92.l+188) leshort x (0x%.4x)
  155. >>>>>>>>(92.l+190) leshort 1 (mono,
  156. >>>>>>>>(92.l+190) leshort 2 (stereo,
  157. >>>>>>>>(92.l+190) leshort >2 (%d channels,
  158. >>>>>>>>(92.l+192) lelong x %d Hz)
  159. # Animated Cursor format
  160. >8 string ACON \b, animated cursor
  161. # SoundFont 2 <mpruett@sgi.com>
  162. >8 string sfbk SoundFont/Bank
  163. # MPEG-1 wrapped in a RIFF, apparently
  164. >8 string CDXA \b, wrapped MPEG-1 (CDXA)
  165. >8 string 4XMV \b, 4X Movie file
  166. #
  167. # XXX - some of the below may only appear in little-endian form.
  168. #
  169. # Also "MV93" appears to be for one form of Macromedia Director
  170. # files, and "GDMF" appears to be another multimedia format.
  171. #
  172. 0 string RIFX RIFF (big-endian) data
  173. # RIFF Palette format
  174. >8 string PAL \b, palette
  175. >>16 beshort x \b, version %d
  176. >>18 beshort x \b, %d entries
  177. # RIFF Device Independent Bitmap format
  178. >8 string RDIB \b, device-independent bitmap
  179. >>16 string BM
  180. >>>30 beshort 12 \b, OS/2 1.x format
  181. >>>>34 beshort x \b, %d x
  182. >>>>36 beshort x %d
  183. >>>30 beshort 64 \b, OS/2 2.x format
  184. >>>>34 beshort x \b, %d x
  185. >>>>36 beshort x %d
  186. >>>30 beshort 40 \b, Windows 3.x format
  187. >>>>34 belong x \b, %d x
  188. >>>>38 belong x %d x
  189. >>>>44 beshort x %d
  190. # RIFF MIDI format
  191. >8 string RMID \b, MIDI
  192. # RIFF Multimedia Movie File format
  193. >8 string RMMP \b, multimedia movie
  194. # Microsoft WAVE format (*.wav)
  195. >8 string WAVE \b, WAVE audio
  196. >>20 leshort 1 \b, Microsoft PCM
  197. >>>34 leshort >0 \b, %d bit
  198. >>22 beshort =1 \b, mono
  199. >>22 beshort =2 \b, stereo
  200. >>22 beshort >2 \b, %d channels
  201. >>24 belong >0 %d Hz
  202. # Corel Draw Picture
  203. >8 string CDRA \b, Corel Draw Picture
  204. # AVI == Audio Video Interleave
  205. >8 string AVI\040 \b, AVI
  206. # Animated Cursor format
  207. >8 string ACON \b, animated cursor
  208. # Notation Interchange File Format (big-endian only)
  209. >8 string NIFF \b, Notation Interchange File Format
  210. # SoundFont 2 <mpruett@sgi.com>
  211. >8 string sfbk SoundFont/Bank