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  1. 

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

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

  4. # See
    5. 

  5. #
    6. 

  6. #	http://www.seanet.com/users/matts/riffmci/riffmci.htm
    7. 

  7. #
    8. 

  8. # AVI section extended by Patrik Rådman <patrik+file-magic@iki.fi>
    9. 

  9. #
    10. 

  10. 0	string		RIFF		RIFF (little-endian) data
    11. 

  11. # RIFF Palette format
    12. 

  12. >8	string		PAL		\b, palette
    13. 

  13. >>16	leshort		x		\b, version %d
    14. 

  14. >>18	leshort		x		\b, %d entries
    15. 

  15. # RIFF Device Independent Bitmap format
    16. 

  16. >8	string		RDIB		\b, device-independent bitmap
    17. 

  17. >>16	string		BM		
    18. 

  18. >>>30	leshort		12		\b, OS/2 1.x format
    19. 

  19. >>>>34	leshort		x		\b, %d x
    20. 

  20. >>>>36	leshort		x		%d
    21. 

  21. >>>30	leshort		64		\b, OS/2 2.x format
    22. 

  22. >>>>34	leshort		x		\b, %d x
    23. 

  23. >>>>36	leshort		x		%d
    24. 

  24. >>>30	leshort		40		\b, Windows 3.x format
    25. 

  25. >>>>34	lelong		x		\b, %d x
    26. 

  26. >>>>38	lelong		x		%d x
    27. 

  27. >>>>44	leshort		x		%d
    28. 

  28. # RIFF MIDI format
    29. 

  29. >8	string		RMID		\b, MIDI
    30. 

  30. # RIFF Multimedia Movie File format
    31. 

  31. >8	string		RMMP		\b, multimedia movie
    32. 

  32. # RIFF wrapper for MP3
    33. 

  33. >8	string		RMP3		\b, MPEG Layer 3 audio
    34. 

  34. # Microsoft WAVE format (*.wav)
    35. 

  35. >8	string		WAVE		\b, WAVE audio
    36. 

  36. !:mime	audio/x-wav
    37. 

  37. >>20	leshort		1		\b, Microsoft PCM
    38. 

  38. >>>34	leshort		>0		\b, %d bit
    39. 

  39. >>20	leshort		2		\b, Microsoft ADPCM
    40. 

  40. >>20	leshort		6		\b, ITU G.711 A-law
    41. 

  41. >>20	leshort		7		\b, ITU G.711 mu-law
    42. 

  42. >>20	leshort		17		\b, IMA ADPCM
    43. 

  43. >>20	leshort		20		\b, ITU G.723 ADPCM (Yamaha)
    44. 

  44. >>20	leshort		49		\b, GSM 6.10
    45. 

  45. >>20	leshort		64		\b, ITU G.721 ADPCM
    46. 

  46. >>20	leshort		80		\b, MPEG
    47. 

  47. >>20	leshort		85		\b, MPEG Layer 3
    48. 

  48. >>22	leshort		=1		\b, mono
    49. 

  49. >>22	leshort		=2		\b, stereo
    50. 

  50. >>22	leshort		>2		\b, %d channels
    51. 

  51. >>24	lelong		>0		%d Hz
    52. 

  52. # Corel Draw Picture
    53. 

  53. >8	string		CDRA		\b, Corel Draw Picture
    54. 

  54. !:mime	image/x-coreldraw
    55. 

  55. # AVI == Audio Video Interleave
    56. 

  56. >8	string		AVI\040		\b, AVI
    57. 

  57. !:mime	video/x-msvideo
    58. 

  58. >>12    string          LIST
    59. 

  59. >>>20   string          hdrlavih
    60. 

  60. >>>>&36 lelong          x               \b, %lu x
    61. 

  61. >>>>&40 lelong          x               %lu,
    62. 

  62. >>>>&4  lelong          >1000000        <1 fps,
    63. 

  63. >>>>&4  lelong          1000000         1.00 fps,
    64. 

  64. >>>>&4  lelong          500000          2.00 fps,
    65. 

  65. >>>>&4  lelong          333333          3.00 fps,
    66. 

  66. >>>>&4  lelong          250000          4.00 fps,
    67. 

  67. >>>>&4  lelong          200000          5.00 fps,
    68. 

  68. >>>>&4  lelong          166667          6.00 fps,
    69. 

  69. >>>>&4  lelong          142857          7.00 fps,
    70. 

  70. >>>>&4  lelong          125000          8.00 fps,
    71. 

  71. >>>>&4  lelong          111111          9.00 fps,
    72. 

  72. >>>>&4  lelong          100000          10.00 fps,
    73. 

  73. # ]9.9,10.1[
    74. 

  74. >>>>&4  lelong          <101010
    75. 

  75. >>>>>&-4        lelong  >99010
    76. 

  76. >>>>>>&-4       lelong  !100000         ~10 fps,
    77. 

  77. >>>>&4  lelong          83333           12.00 fps,
    78. 

  78. # ]11.9,12.1[
    79. 

  79. >>>>&4  lelong          <84034
    80. 

  80. >>>>>&-4        lelong  >82645
    81. 

  81. >>>>>>&-4       lelong  !83333          ~12 fps,
    82. 

  82. >>>>&4  lelong          66667           15.00 fps,
    83. 

  83. # ]14.9,15.1[
    84. 

  84. >>>>&4  lelong          <67114
    85. 

  85. >>>>>&-4        lelong  >66225
    86. 

  86. >>>>>>&-4       lelong  !66667          ~15 fps,
    87. 

  87. >>>>&4  lelong          50000           20.00 fps,
    88. 

  88. >>>>&4  lelong          41708           23.98 fps,
    89. 

  89. >>>>&4  lelong          41667           24.00 fps,
    90. 

  90. # ]23.9,24.1[
    91. 

  91. >>>>&4  lelong          <41841
    92. 

  92. >>>>>&-4        lelong  >41494
    93. 

  93. >>>>>>&-4       lelong  !41708
    94. 

  94. >>>>>>>&-4      lelong  !41667          ~24 fps,
    95. 

  95. >>>>&4  lelong          40000           25.00 fps,
    96. 

  96. # ]24.9,25.1[
    97. 

  97. >>>>&4  lelong          <40161
    98. 

  98. >>>>>&-4        lelong  >39841
    99. 

  99. >>>>>>&-4       lelong  !40000          ~25 fps,
    100. 

  100. >>>>&4  lelong          33367           29.97 fps,
    101. 

  101. >>>>&4  lelong          33333           30.00 fps,
    102. 

  102. # ]29.9,30.1[
    103. 

  103. >>>>&4  lelong          <33445
    104. 

  104. >>>>>&-4        lelong  >33223
    105. 

  105. >>>>>>&-4       lelong  !33367
    106. 

  106. >>>>>>>&-4      lelong  !33333          ~30 fps,
    107. 

  107. >>>>&4  lelong          <32224          >30 fps,
    108. 

  108. ##>>>>&4  lelong          x               (%lu)
    109. 

  109. ##>>>>&20 lelong          x               %lu frames,
    110. 

  110. # Note: The tests below assume that the AVI has 1 or 2 streams,
    111. 

  111. #       "vids" optionally followed by "auds".
    112. 

  112. #       (Should cover 99.9% of all AVIs.)
    113. 

  113. # assuming avih length = 56
    114. 

  114. >>>88   string  LIST
    115. 

  115. >>>>96  string  strlstrh
    116. 

  116. >>>>>108        string  vids    video:
    117. 

  117. >>>>>>&0        lelong  0               uncompressed
    118. 

  118. # skip past vids strh
    119. 

  119. >>>>>>(104.l+108)       string  strf
    120. 

  120. >>>>>>>(104.l+132)      lelong          1       RLE 8bpp
    121. 

  121. >>>>>>>(104.l+132)      string/c        cvid    Cinepak
    122. 

  122. >>>>>>>(104.l+132)      string/c        i263    Intel I.263
    123. 

  123. >>>>>>>(104.l+132)      string/c        iv32    Indeo 3.2
    124. 

  124. >>>>>>>(104.l+132)      string/c        iv41    Indeo 4.1
    125. 

  125. >>>>>>>(104.l+132)      string/c        iv50    Indeo 5.0
    126. 

  126. >>>>>>>(104.l+132)      string/c        mp42    Microsoft MPEG-4 v2
    127. 

  127. >>>>>>>(104.l+132)      string/c        mp43    Microsoft MPEG-4 v3
    128. 

  128. >>>>>>>(104.l+132)      string/c        fmp4    FFMpeg MPEG-4
    129. 

  129. >>>>>>>(104.l+132)      string/c        mjpg    Motion JPEG
    130. 

  130. >>>>>>>(104.l+132)      string/c        div3    DivX 3
    131. 

  131. >>>>>>>>112             string/c        div3    Low-Motion
    132. 

  132. >>>>>>>>112             string/c        div4    Fast-Motion
    133. 

  133. >>>>>>>(104.l+132)      string/c        divx    DivX 4
    134. 

  134. >>>>>>>(104.l+132)      string/c        dx50    DivX 5
    135. 

  135. >>>>>>>(104.l+132)      string/c        xvid    XviD
    136. 

  136. >>>>>>>(104.l+132)	string/c	h264	H.264
    137. 

  137. >>>>>>>(104.l+132)      string/c        wmv3    Windows Media Video 9
    138. 

  138. >>>>>>>(104.l+132)      string/c        h264    X.264 or H.264
    139. 

  139. >>>>>>>(104.l+132)      lelong  0
    140. 

  140. ##>>>>>>>(104.l+132)      string  x       (%.4s)
    141. 

  141. # skip past first (video) LIST
    142. 

  142. >>>>(92.l+96)   string  LIST
    143. 

  143. >>>>>(92.l+104) string  strlstrh
    144. 

  144. >>>>>>(92.l+116)        string          auds    \b, audio:
    145. 

  145. # auds strh length = 56:
    146. 

  146. >>>>>>>(92.l+172)       string          strf
    147. 

  147. >>>>>>>>(92.l+180)      leshort 0x0001  uncompressed PCM
    148. 

  148. >>>>>>>>(92.l+180)      leshort 0x0002  ADPCM
    149. 

  149. >>>>>>>>(92.l+180)      leshort 0x0006  aLaw
    150. 

  150. >>>>>>>>(92.l+180)      leshort 0x0007  uLaw
    151. 

  151. >>>>>>>>(92.l+180)      leshort 0x0050  MPEG-1 Layer 1 or 2
    152. 

  152. >>>>>>>>(92.l+180)      leshort 0x0055  MPEG-1 Layer 3
    153. 

  153. >>>>>>>>(92.l+180)      leshort 0x2000  Dolby AC3
    154. 

  154. >>>>>>>>(92.l+180)      leshort 0x0161  DivX
    155. 

  155. ##>>>>>>>>(92.l+180)      leshort x       (0x%.4x)
    156. 

  156. >>>>>>>>(92.l+182)      leshort 1       (mono,
    157. 

  157. >>>>>>>>(92.l+182)      leshort 2       (stereo,
    158. 

  158. >>>>>>>>(92.l+182)      leshort >2      (%d channels,
    159. 

  159. >>>>>>>>(92.l+184)      lelong  x       %d Hz)
    160. 

  160. # auds strh length = 64:
    161. 

  161. >>>>>>>(92.l+180)       string          strf
    162. 

  162. >>>>>>>>(92.l+188)      leshort 0x0001  uncompressed PCM
    163. 

  163. >>>>>>>>(92.l+188)      leshort 0x0002  ADPCM
    164. 

  164. >>>>>>>>(92.l+188)      leshort 0x0055  MPEG-1 Layer 3
    165. 

  165. >>>>>>>>(92.l+188)      leshort 0x2000  Dolby AC3
    166. 

  166. >>>>>>>>(92.l+188)      leshort 0x0161  DivX
    167. 

  167. ##>>>>>>>>(92.l+188)      leshort x       (0x%.4x)
    168. 

  168. >>>>>>>>(92.l+190)      leshort 1       (mono,
    169. 

  169. >>>>>>>>(92.l+190)      leshort 2       (stereo,
    170. 

  170. >>>>>>>>(92.l+190)      leshort >2      (%d channels,
    171. 

  171. >>>>>>>>(92.l+192)      lelong  x       %d Hz)
    172. 

  172. # Animated Cursor format
    173. 

  173. >8	string		ACON		\b, animated cursor
    174. 

  174. # SoundFont 2 <mpruett@sgi.com>
    175. 

  175. >8	string		sfbk		SoundFont/Bank
    176. 

  176. # MPEG-1 wrapped in a RIFF, apparently
    177. 

  177. >8      string          CDXA            \b, wrapped MPEG-1 (CDXA)
    178. 

  178. >8	string		4XMV		\b, 4X Movie file 
    179. 

  179. 

  180. #
    181. 

  181. # XXX - some of the below may only appear in little-endian form.
    182. 

  182. #
    183. 

  183. # Also "MV93" appears to be for one form of Macromedia Director
    184. 

  184. # files, and "GDMF" appears to be another multimedia format.
    185. 

  185. #
    186. 

  186. 0	string		RIFX		RIFF (big-endian) data
    187. 

  187. # RIFF Palette format
    188. 

  188. >8	string		PAL		\b, palette
    189. 

  189. >>16	beshort		x		\b, version %d
    190. 

  190. >>18	beshort		x		\b, %d entries
    191. 

  191. # RIFF Device Independent Bitmap format
    192. 

  192. >8	string		RDIB		\b, device-independent bitmap
    193. 

  193. >>16	string		BM		
    194. 

  194. >>>30	beshort		12		\b, OS/2 1.x format
    195. 

  195. >>>>34	beshort		x		\b, %d x
    196. 

  196. >>>>36	beshort		x		%d
    197. 

  197. >>>30	beshort		64		\b, OS/2 2.x format
    198. 

  198. >>>>34	beshort		x		\b, %d x
    199. 

  199. >>>>36	beshort		x		%d
    200. 

  200. >>>30	beshort		40		\b, Windows 3.x format
    201. 

  201. >>>>34	belong		x		\b, %d x
    202. 

  202. >>>>38	belong		x		%d x
    203. 

  203. >>>>44	beshort		x		%d
    204. 

  204. # RIFF MIDI format
    205. 

  205. >8	string		RMID		\b, MIDI
    206. 

  206. # RIFF Multimedia Movie File format
    207. 

  207. >8	string		RMMP		\b, multimedia movie
    208. 

  208. # Microsoft WAVE format (*.wav)
    209. 

  209. >8	string		WAVE		\b, WAVE audio
    210. 

  210. >>20	leshort		1		\b, Microsoft PCM
    211. 

  211. >>>34	leshort		>0		\b, %d bit
    212. 

  212. >>22	beshort		=1		\b, mono
    213. 

  213. >>22	beshort		=2		\b, stereo
    214. 

  214. >>22	beshort		>2		\b, %d channels
    215. 

  215. >>24	belong		>0		%d Hz
    216. 

  216. # Corel Draw Picture
    217. 

  217. >8	string		CDRA		\b, Corel Draw Picture
    218. 

  218. # AVI == Audio Video Interleave
    219. 

  219. >8	string		AVI\040		\b, AVI
    220. 

  220. # Animated Cursor format
    221. 

  221. >8	string		ACON		\b, animated cursor
    222. 

  222. # Notation Interchange File Format (big-endian only)
    223. 

  223. >8	string		NIFF		\b, Notation Interchange File Format
    224. 

  224. # SoundFont 2 <mpruett@sgi.com>
    225. 

  225. >8	string		sfbk		SoundFont/Bank
    226.