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huffman.cpp
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VC书籍

开发平台：

Visual C++

huffman.cpp：源码内容
  1. /* huffman.cpp
  3. Huffman decoder for Layer III
  5.    01/28/97 : Adapted from "huffman.c" from the ISO MPEG Audio Subgroup Software
  6.    Simulation Group's public c source for its MPEG audio decoder. Optimizations
  7.    and conversion of stdio routines to stream routines by Jeff Tsay
  8.    (ctsay@pasteur.eecs.berkeley.edu). Also most error checks were removed.
  10.    02/19/97 (Version 1.81):
  12. Added internal huffman tables converted by:
  14.     Timo Jantunen
  15.     E-mail: timo.jantunen@hut.fi,
  16.      URL: http://www.hut.fi/~jeti/
  18.    The file "huffdec" is no longer needed,
  19.    and neither are the routines to read from this file. */
  21. /**********************************************************************
  22. Copyright (c) 1991 MPEG/audio software simulation group, All Rights Reserved
  23. huffman.c
  24. **********************************************************************/
  25. /**********************************************************************
  26.  * MPEG/audio coding/decoding software, work in progress              *
  27.  *   NOT for public distribution until verified and approved by the   *
  28.  *   MPEG/audio committee.  For further information, please contact   *
  29.  *   Davis Pan, 508-493-2241, e-mail: pan@gauss.enet.dec.com          *
  30.  *                                                                    *
  31.  * VERSION 2.10                                                       *
  32.  *   changes made since last update:                                  *
  33.  *   date   programmers                comment                        *
  34.  *27.2.92   F.O.Witte                  (ITT Intermetall)              *
  35.  *        email: otto.witte@itt-sc.de    *
  36.  *        tel:   ++49 (761)517-125       *
  37.  *        fax:   ++49 (761)517-880       *
  38.  *12.6.92   J. Pineda                  Added sign bit to decoder.     *
  39.  * 08/24/93 M. Iwadare                 Changed for 1 pass decoding.   *
  40.  *--------------------------------------------------------------------*
  41.  *  7/14/94 Juergen Koller      Bug fixes in Layer III code           *
  42.  *********************************************************************/
  44. #include "all.h"
  45. #include <stdio.h> // needed for definition of NULL
  46. #include "bit_res.h"
  47. #include "huffman.h"
  50. HUFFBITS dmask = 1 << ((sizeof(HUFFBITS) * 8) - 1);
  51. uint32   hs    = sizeof(HUFFBITS) * 8;
  53. unsigned char ValTab0[1][2] = {
  54. {0,0} // dummy
  55. };
  57. unsigned char ValTab1[7][2] = {
  58. {2,1},{0,0},{2,1},{0,16},{2,1},{0,1},{0,17},
  59. };
  60. unsigned char ValTab2[17][2] = {
  61. {2,1},{0,0},{4,1},{2,1},{0,16},{0,1},{2,1},{0,17},{4,1},{2,1},
  62. {0,32},{0,33},{2,1},{0,18},{2,1},{0,2},{0,34},
  63. };
  64. unsigned char ValTab3[17][2] = {
  65. {4,1},{2,1},{0,0},{0,1},{2,1},{0,17},{2,1},{0,16},{4,1},{2,1},
  66. {0,32},{0,33},{2,1},{0,18},{2,1},{0,2},{0,34},
  67. };
  69. unsigned char ValTab4[1][2] = {{0,0}}; // dummy
  71. unsigned char ValTab5[31][2] = {
  72. {2,1},{0,0},{4,1},{2,1},{0,16},{0,1},{2,1},{0,17},{8,1},{4,1},
  73. {2,1},{0,32},{0,2},{2,1},{0,33},{0,18},{8,1},{4,1},{2,1},{0,34},
  74. {0,48},{2,1},{0,3},{0,19},{2,1},{0,49},{2,1},{0,50},{2,1},{0,35},
  75. {0,51},
  76. };
  77. unsigned char ValTab6[31][2] = {
  78. {6,1},{4,1},{2,1},{0,0},{0,16},{0,17},{6,1},{2,1},{0,1},{2,1},
  79. {0,32},{0,33},{6,1},{2,1},{0,18},{2,1},{0,2},{0,34},{4,1},{2,1},
  80. {0,49},{0,19},{4,1},{2,1},{0,48},{0,50},{2,1},{0,35},{2,1},{0,3},
  81. {0,51},
  82. };
  83. unsigned char ValTab7[71][2] = {
  84. {2,1},{0,0},{4,1},{2,1},{0,16},{0,1},{8,1},{2,1},{0,17},{4,1},
  85. {2,1},{0,32},{0,2},{0,33},{18,1},{6,1},{2,1},{0,18},{2,1},{0,34},
  86. {0,48},{4,1},{2,1},{0,49},{0,19},{4,1},{2,1},{0,3},{0,50},{2,1},
  87. {0,35},{0,4},{10,1},{4,1},{2,1},{0,64},{0,65},{2,1},{0,20},{2,1},
  88. {0,66},{0,36},{12,1},{6,1},{4,1},{2,1},{0,51},{0,67},{0,80},{4,1},
  89. {2,1},{0,52},{0,5},{0,81},{6,1},{2,1},{0,21},{2,1},{0,82},{0,37},
  90. {4,1},{2,1},{0,68},{0,53},{4,1},{2,1},{0,83},{0,84},{2,1},{0,69},
  91. {0,85},
  92. };
  93. unsigned char ValTab8[71][2] = {
  94. {6,1},{2,1},{0,0},{2,1},{0,16},{0,1},{2,1},{0,17},{4,1},{2,1},
  95. {0,33},{0,18},{14,1},{4,1},{2,1},{0,32},{0,2},{2,1},{0,34},{4,1},
  96. {2,1},{0,48},{0,3},{2,1},{0,49},{0,19},{14,1},{8,1},{4,1},{2,1},
  97. {0,50},{0,35},{2,1},{0,64},{0,4},{2,1},{0,65},{2,1},{0,20},{0,66},
  98. {12,1},{6,1},{2,1},{0,36},{2,1},{0,51},{0,80},{4,1},{2,1},{0,67},
  99. {0,52},{0,81},{6,1},{2,1},{0,21},{2,1},{0,5},{0,82},{6,1},{2,1},
  100. {0,37},{2,1},{0,68},{0,53},{2,1},{0,83},{2,1},{0,69},{2,1},{0,84},
  101. {0,85},
  102. };
  103. unsigned char ValTab9[71][2] = {
  104. {8,1},{4,1},{2,1},{0,0},{0,16},{2,1},{0,1},{0,17},{10,1},{4,1},
  105. {2,1},{0,32},{0,33},{2,1},{0,18},{2,1},{0,2},{0,34},{12,1},{6,1},
  106. {4,1},{2,1},{0,48},{0,3},{0,49},{2,1},{0,19},{2,1},{0,50},{0,35},
  107. {12,1},{4,1},{2,1},{0,65},{0,20},{4,1},{2,1},{0,64},{0,51},{2,1},
  108. {0,66},{0,36},{10,1},{6,1},{4,1},{2,1},{0,4},{0,80},{0,67},{2,1},
  109. {0,52},{0,81},{8,1},{4,1},{2,1},{0,21},{0,82},{2,1},{0,37},{0,68},
  110. {6,1},{4,1},{2,1},{0,5},{0,84},{0,83},{2,1},{0,53},{2,1},{0,69},
  111. {0,85},
  112. };
  113. unsigned char ValTab10[127][2] = {
  114. {2,1},{0,0},{4,1},{2,1},{0,16},{0,1},{10,1},{2,1},{0,17},{4,1},
  115. {2,1},{0,32},{0,2},{2,1},{0,33},{0,18},{28,1},{8,1},{4,1},{2,1},
  116. {0,34},{0,48},{2,1},{0,49},{0,19},{8,1},{4,1},{2,1},{0,3},{0,50},
  117. {2,1},{0,35},{0,64},{4,1},{2,1},{0,65},{0,20},{4,1},{2,1},{0,4},
  118. {0,51},{2,1},{0,66},{0,36},{28,1},{10,1},{6,1},{4,1},{2,1},{0,80},
  119. {0,5},{0,96},{2,1},{0,97},{0,22},{12,1},{6,1},{4,1},{2,1},{0,67},
  120. {0,52},{0,81},{2,1},{0,21},{2,1},{0,82},{0,37},{4,1},{2,1},{0,38},
  121. {0,54},{0,113},{20,1},{8,1},{2,1},{0,23},{4,1},{2,1},{0,68},{0,83},
  122. {0,6},{6,1},{4,1},{2,1},{0,53},{0,69},{0,98},{2,1},{0,112},{2,1},
  123. {0,7},{0,100},{14,1},{4,1},{2,1},{0,114},{0,39},{6,1},{2,1},{0,99},
  124. {2,1},{0,84},{0,85},{2,1},{0,70},{0,115},{8,1},{4,1},{2,1},{0,55},
  125. {0,101},{2,1},{0,86},{0,116},{6,1},{2,1},{0,71},{2,1},{0,102},{0,117},
  126. {4,1},{2,1},{0,87},{0,118},{2,1},{0,103},{0,119},
  127. };
  128. unsigned char ValTab11[127][2] = {
  129. {6,1},{2,1},{0,0},{2,1},{0,16},{0,1},{8,1},{2,1},{0,17},{4,1},
  130. {2,1},{0,32},{0,2},{0,18},{24,1},{8,1},{2,1},{0,33},{2,1},{0,34},
  131. {2,1},{0,48},{0,3},{4,1},{2,1},{0,49},{0,19},{4,1},{2,1},{0,50},
  132. {0,35},{4,1},{2,1},{0,64},{0,4},{2,1},{0,65},{0,20},{30,1},{16,1},
  133. {10,1},{4,1},{2,1},{0,66},{0,36},{4,1},{2,1},{0,51},{0,67},{0,80},
  134. {4,1},{2,1},{0,52},{0,81},{0,97},{6,1},{2,1},{0,22},{2,1},{0,6},
  135. {0,38},{2,1},{0,98},{2,1},{0,21},{2,1},{0,5},{0,82},{16,1},{10,1},
  136. {6,1},{4,1},{2,1},{0,37},{0,68},{0,96},{2,1},{0,99},{0,54},{4,1},
  137. {2,1},{0,112},{0,23},{0,113},{16,1},{6,1},{4,1},{2,1},{0,7},{0,100},
  138. {0,114},{2,1},{0,39},{4,1},{2,1},{0,83},{0,53},{2,1},{0,84},{0,69},
  139. {10,1},{4,1},{2,1},{0,70},{0,115},{2,1},{0,55},{2,1},{0,101},{0,86},
  140. {10,1},{6,1},{4,1},{2,1},{0,85},{0,87},{0,116},{2,1},{0,71},{0,102},
  141. {4,1},{2,1},{0,117},{0,118},{2,1},{0,103},{0,119},
  142. };
  143. unsigned char ValTab12[127][2] = {
  144. {12,1},{4,1},{2,1},{0,16},{0,1},{2,1},{0,17},{2,1},{0,0},{2,1},
  145. {0,32},{0,2},{16,1},{4,1},{2,1},{0,33},{0,18},{4,1},{2,1},{0,34},
  146. {0,49},{2,1},{0,19},{2,1},{0,48},{2,1},{0,3},{0,64},{26,1},{8,1},
  147. {4,1},{2,1},{0,50},{0,35},{2,1},{0,65},{0,51},{10,1},{4,1},{2,1},
  148. {0,20},{0,66},{2,1},{0,36},{2,1},{0,4},{0,80},{4,1},{2,1},{0,67},
  149. {0,52},{2,1},{0,81},{0,21},{28,1},{14,1},{8,1},{4,1},{2,1},{0,82},
  150. {0,37},{2,1},{0,83},{0,53},{4,1},{2,1},{0,96},{0,22},{0,97},{4,1},
  151. {2,1},{0,98},{0,38},{6,1},{4,1},{2,1},{0,5},{0,6},{0,68},{2,1},
  152. {0,84},{0,69},{18,1},{10,1},{4,1},{2,1},{0,99},{0,54},{4,1},{2,1},
  153. {0,112},{0,7},{0,113},{4,1},{2,1},{0,23},{0,100},{2,1},{0,70},{0,114},
  154. {10,1},{6,1},{2,1},{0,39},{2,1},{0,85},{0,115},{2,1},{0,55},{0,86},
  155. {8,1},{4,1},{2,1},{0,101},{0,116},{2,1},{0,71},{0,102},{4,1},{2,1},
  156. {0,117},{0,87},{2,1},{0,118},{2,1},{0,103},{0,119},
  157. };
  158. unsigned char ValTab13[511][2] = {
  159. {2,1},{0,0},{6,1},{2,1},{0,16},{2,1},{0,1},{0,17},{28,1},{8,1},
  160. {4,1},{2,1},{0,32},{0,2},{2,1},{0,33},{0,18},{8,1},{4,1},{2,1},
  161. {0,34},{0,48},{2,1},{0,3},{0,49},{6,1},{2,1},{0,19},{2,1},{0,50},
  162. {0,35},{4,1},{2,1},{0,64},{0,4},{0,65},{70,1},{28,1},{14,1},{6,1},
  163. {2,1},{0,20},{2,1},{0,51},{0,66},{4,1},{2,1},{0,36},{0,80},{2,1},
  164. {0,67},{0,52},{4,1},{2,1},{0,81},{0,21},{4,1},{2,1},{0,5},{0,82},
  165. {2,1},{0,37},{2,1},{0,68},{0,83},{14,1},{8,1},{4,1},{2,1},{0,96},
  166. {0,6},{2,1},{0,97},{0,22},{4,1},{2,1},{0,128},{0,8},{0,129},{16,1},
  167. {8,1},{4,1},{2,1},{0,53},{0,98},{2,1},{0,38},{0,84},{4,1},{2,1},
  168. {0,69},{0,99},{2,1},{0,54},{0,112},{6,1},{4,1},{2,1},{0,7},{0,85},
  169. {0,113},{2,1},{0,23},{2,1},{0,39},{0,55},{72,1},{24,1},{12,1},{4,1},
  170. {2,1},{0,24},{0,130},{2,1},{0,40},{4,1},{2,1},{0,100},{0,70},{0,114},
  171. {8,1},{4,1},{2,1},{0,132},{0,72},{2,1},{0,144},{0,9},{2,1},{0,145},
  172. {0,25},{24,1},{14,1},{8,1},{4,1},{2,1},{0,115},{0,101},{2,1},{0,86},
  173. {0,116},{4,1},{2,1},{0,71},{0,102},{0,131},{6,1},{2,1},{0,56},{2,1},
  174. {0,117},{0,87},{2,1},{0,146},{0,41},{14,1},{8,1},{4,1},{2,1},{0,103},
  175. {0,133},{2,1},{0,88},{0,57},{2,1},{0,147},{2,1},{0,73},{0,134},{6,1},
  176. {2,1},{0,160},{2,1},{0,104},{0,10},{2,1},{0,161},{0,26},{68,1},{24,1},
  177. {12,1},{4,1},{2,1},{0,162},{0,42},{4,1},{2,1},{0,149},{0,89},{2,1},
  178. {0,163},{0,58},{8,1},{4,1},{2,1},{0,74},{0,150},{2,1},{0,176},{0,11},
  179. {2,1},{0,177},{0,27},{20,1},{8,1},{2,1},{0,178},{4,1},{2,1},{0,118},
  180. {0,119},{0,148},{6,1},{4,1},{2,1},{0,135},{0,120},{0,164},{4,1},{2,1},
  181. {0,105},{0,165},{0,43},{12,1},{6,1},{4,1},{2,1},{0,90},{0,136},{0,179},
  182. {2,1},{0,59},{2,1},{0,121},{0,166},{6,1},{4,1},{2,1},{0,106},{0,180},
  183. {0,192},{4,1},{2,1},{0,12},{0,152},{0,193},{60,1},{22,1},{10,1},{6,1},
  184. {2,1},{0,28},{2,1},{0,137},{0,181},{2,1},{0,91},{0,194},{4,1},{2,1},
  185. {0,44},{0,60},{4,1},{2,1},{0,182},{0,107},{2,1},{0,196},{0,76},{16,1},
  186. {8,1},{4,1},{2,1},{0,168},{0,138},{2,1},{0,208},{0,13},{2,1},{0,209},
  187. {2,1},{0,75},{2,1},{0,151},{0,167},{12,1},{6,1},{2,1},{0,195},{2,1},
  188. {0,122},{0,153},{4,1},{2,1},{0,197},{0,92},{0,183},{4,1},{2,1},{0,29},
  189. {0,210},{2,1},{0,45},{2,1},{0,123},{0,211},{52,1},{28,1},{12,1},{4,1},
  190. {2,1},{0,61},{0,198},{4,1},{2,1},{0,108},{0,169},{2,1},{0,154},{0,212},
  191. {8,1},{4,1},{2,1},{0,184},{0,139},{2,1},{0,77},{0,199},{4,1},{2,1},
  192. {0,124},{0,213},{2,1},{0,93},{0,224},{10,1},{4,1},{2,1},{0,225},{0,30},
  193. {4,1},{2,1},{0,14},{0,46},{0,226},{8,1},{4,1},{2,1},{0,227},{0,109},
  194. {2,1},{0,140},{0,228},{4,1},{2,1},{0,229},{0,186},{0,240},{38,1},{16,1},
  195. {4,1},{2,1},{0,241},{0,31},{6,1},{4,1},{2,1},{0,170},{0,155},{0,185},
  196. {2,1},{0,62},{2,1},{0,214},{0,200},{12,1},{6,1},{2,1},{0,78},{2,1},
  197. {0,215},{0,125},{2,1},{0,171},{2,1},{0,94},{0,201},{6,1},{2,1},{0,15},
  198. {2,1},{0,156},{0,110},{2,1},{0,242},{0,47},{32,1},{16,1},{6,1},{4,1},
  199. {2,1},{0,216},{0,141},{0,63},{6,1},{2,1},{0,243},{2,1},{0,230},{0,202},
  200. {2,1},{0,244},{0,79},{8,1},{4,1},{2,1},{0,187},{0,172},{2,1},{0,231},
  201. {0,245},{4,1},{2,1},{0,217},{0,157},{2,1},{0,95},{0,232},{30,1},{12,1},
  202. {6,1},{2,1},{0,111},{2,1},{0,246},{0,203},{4,1},{2,1},{0,188},{0,173},
  203. {0,218},{8,1},{2,1},{0,247},{4,1},{2,1},{0,126},{0,127},{0,142},{6,1},
  204. {4,1},{2,1},{0,158},{0,174},{0,204},{2,1},{0,248},{0,143},{18,1},{8,1},
  205. {4,1},{2,1},{0,219},{0,189},{2,1},{0,234},{0,249},{4,1},{2,1},{0,159},
  206. {0,235},{2,1},{0,190},{2,1},{0,205},{0,250},{14,1},{4,1},{2,1},{0,221},
  207. {0,236},{6,1},{4,1},{2,1},{0,233},{0,175},{0,220},{2,1},{0,206},{0,251},
  208. {8,1},{4,1},{2,1},{0,191},{0,222},{2,1},{0,207},{0,238},{4,1},{2,1},
  209. {0,223},{0,239},{2,1},{0,255},{2,1},{0,237},{2,1},{0,253},{2,1},{0,252},
  210. {0,254},
  211. };
  212. unsigned char ValTab14[1][2] = {
  213. {0,0}  // dummy
  214. };
  215. unsigned char ValTab15[511][2] = {
  216. {16,1},{6,1},{2,1},{0,0},{2,1},{0,16},{0,1},{2,1},{0,17},{4,1},
  217. {2,1},{0,32},{0,2},{2,1},{0,33},{0,18},{50,1},{16,1},{6,1},{2,1},
  218. {0,34},{2,1},{0,48},{0,49},{6,1},{2,1},{0,19},{2,1},{0,3},{0,64},
  219. {2,1},{0,50},{0,35},{14,1},{6,1},{4,1},{2,1},{0,4},{0,20},{0,65},
  220. {4,1},{2,1},{0,51},{0,66},{2,1},{0,36},{0,67},{10,1},{6,1},{2,1},
  221. {0,52},{2,1},{0,80},{0,5},{2,1},{0,81},{0,21},{4,1},{2,1},{0,82},
  222. {0,37},{4,1},{2,1},{0,68},{0,83},{0,97},{90,1},{36,1},{18,1},{10,1},
  223. {6,1},{2,1},{0,53},{2,1},{0,96},{0,6},{2,1},{0,22},{0,98},{4,1},
  224. {2,1},{0,38},{0,84},{2,1},{0,69},{0,99},{10,1},{6,1},{2,1},{0,54},
  225. {2,1},{0,112},{0,7},{2,1},{0,113},{0,85},{4,1},{2,1},{0,23},{0,100},
  226. {2,1},{0,114},{0,39},{24,1},{16,1},{8,1},{4,1},{2,1},{0,70},{0,115},
  227. {2,1},{0,55},{0,101},{4,1},{2,1},{0,86},{0,128},{2,1},{0,8},{0,116},
  228. {4,1},{2,1},{0,129},{0,24},{2,1},{0,130},{0,40},{16,1},{8,1},{4,1},
  229. {2,1},{0,71},{0,102},{2,1},{0,131},{0,56},{4,1},{2,1},{0,117},{0,87},
  230. {2,1},{0,132},{0,72},{6,1},{4,1},{2,1},{0,144},{0,25},{0,145},{4,1},
  231. {2,1},{0,146},{0,118},{2,1},{0,103},{0,41},{92,1},{36,1},{18,1},{10,1},
  232. {4,1},{2,1},{0,133},{0,88},{4,1},{2,1},{0,9},{0,119},{0,147},{4,1},
  233. {2,1},{0,57},{0,148},{2,1},{0,73},{0,134},{10,1},{6,1},{2,1},{0,104},
  234. {2,1},{0,160},{0,10},{2,1},{0,161},{0,26},{4,1},{2,1},{0,162},{0,42},
  235. {2,1},{0,149},{0,89},{26,1},{14,1},{6,1},{2,1},{0,163},{2,1},{0,58},
  236. {0,135},{4,1},{2,1},{0,120},{0,164},{2,1},{0,74},{0,150},{6,1},{4,1},
  237. {2,1},{0,105},{0,176},{0,177},{4,1},{2,1},{0,27},{0,165},{0,178},{14,1},
  238. {8,1},{4,1},{2,1},{0,90},{0,43},{2,1},{0,136},{0,151},{2,1},{0,179},
  239. {2,1},{0,121},{0,59},{8,1},{4,1},{2,1},{0,106},{0,180},{2,1},{0,75},
  240. {0,193},{4,1},{2,1},{0,152},{0,137},{2,1},{0,28},{0,181},{80,1},{34,1},
  241. {16,1},{6,1},{4,1},{2,1},{0,91},{0,44},{0,194},{6,1},{4,1},{2,1},
  242. {0,11},{0,192},{0,166},{2,1},{0,167},{0,122},{10,1},{4,1},{2,1},{0,195},
  243. {0,60},{4,1},{2,1},{0,12},{0,153},{0,182},{4,1},{2,1},{0,107},{0,196},
  244. {2,1},{0,76},{0,168},{20,1},{10,1},{4,1},{2,1},{0,138},{0,197},{4,1},
  245. {2,1},{0,208},{0,92},{0,209},{4,1},{2,1},{0,183},{0,123},{2,1},{0,29},
  246. {2,1},{0,13},{0,45},{12,1},{4,1},{2,1},{0,210},{0,211},{4,1},{2,1},
  247. {0,61},{0,198},{2,1},{0,108},{0,169},{6,1},{4,1},{2,1},{0,154},{0,184},
  248. {0,212},{4,1},{2,1},{0,139},{0,77},{2,1},{0,199},{0,124},{68,1},{34,1},
  249. {18,1},{10,1},{4,1},{2,1},{0,213},{0,93},{4,1},{2,1},{0,224},{0,14},
  250. {0,225},{4,1},{2,1},{0,30},{0,226},{2,1},{0,170},{0,46},{8,1},{4,1},
  251. {2,1},{0,185},{0,155},{2,1},{0,227},{0,214},{4,1},{2,1},{0,109},{0,62},
  252. {2,1},{0,200},{0,140},{16,1},{8,1},{4,1},{2,1},{0,228},{0,78},{2,1},
  253. {0,215},{0,125},{4,1},{2,1},{0,229},{0,186},{2,1},{0,171},{0,94},{8,1},
  254. {4,1},{2,1},{0,201},{0,156},{2,1},{0,241},{0,31},{6,1},{4,1},{2,1},
  255. {0,240},{0,110},{0,242},{2,1},{0,47},{0,230},{38,1},{18,1},{8,1},{4,1},
  256. {2,1},{0,216},{0,243},{2,1},{0,63},{0,244},{6,1},{2,1},{0,79},{2,1},
  257. {0,141},{0,217},{2,1},{0,187},{0,202},{8,1},{4,1},{2,1},{0,172},{0,231},
  258. {2,1},{0,126},{0,245},{8,1},{4,1},{2,1},{0,157},{0,95},{2,1},{0,232},
  259. {0,142},{2,1},{0,246},{0,203},{34,1},{18,1},{10,1},{6,1},{4,1},{2,1},
  260. {0,15},{0,174},{0,111},{2,1},{0,188},{0,218},{4,1},{2,1},{0,173},{0,247},
  261. {2,1},{0,127},{0,233},{8,1},{4,1},{2,1},{0,158},{0,204},{2,1},{0,248},
  262. {0,143},{4,1},{2,1},{0,219},{0,189},{2,1},{0,234},{0,249},{16,1},{8,1},
  263. {4,1},{2,1},{0,159},{0,220},{2,1},{0,205},{0,235},{4,1},{2,1},{0,190},
  264. {0,250},{2,1},{0,175},{0,221},{14,1},{6,1},{4,1},{2,1},{0,236},{0,206},
  265. {0,251},{4,1},{2,1},{0,191},{0,237},{2,1},{0,222},{0,252},{6,1},{4,1},
  266. {2,1},{0,207},{0,253},{0,238},{4,1},{2,1},{0,223},{0,254},{2,1},{0,239},
  267. {0,255},
  268. };
  269. unsigned char ValTab16[511][2] = {
  270. {2,1},{0,0},{6,1},{2,1},{0,16},{2,1},{0,1},{0,17},{42,1},{8,1},
  271. {4,1},{2,1},{0,32},{0,2},{2,1},{0,33},{0,18},{10,1},{6,1},{2,1},
  272. {0,34},{2,1},{0,48},{0,3},{2,1},{0,49},{0,19},{10,1},{4,1},{2,1},
  273. {0,50},{0,35},{4,1},{2,1},{0,64},{0,4},{0,65},{6,1},{2,1},{0,20},
  274. {2,1},{0,51},{0,66},{4,1},{2,1},{0,36},{0,80},{2,1},{0,67},{0,52},
  275. {138,1},{40,1},{16,1},{6,1},{4,1},{2,1},{0,5},{0,21},{0,81},{4,1},
  276. {2,1},{0,82},{0,37},{4,1},{2,1},{0,68},{0,53},{0,83},{10,1},{6,1},
  277. {4,1},{2,1},{0,96},{0,6},{0,97},{2,1},{0,22},{0,98},{8,1},{4,1},
  278. {2,1},{0,38},{0,84},{2,1},{0,69},{0,99},{4,1},{2,1},{0,54},{0,112},
  279. {0,113},{40,1},{18,1},{8,1},{2,1},{0,23},{2,1},{0,7},{2,1},{0,85},
  280. {0,100},{4,1},{2,1},{0,114},{0,39},{4,1},{2,1},{0,70},{0,101},{0,115},
  281. {10,1},{6,1},{2,1},{0,55},{2,1},{0,86},{0,8},{2,1},{0,128},{0,129},
  282. {6,1},{2,1},{0,24},{2,1},{0,116},{0,71},{2,1},{0,130},{2,1},{0,40},
  283. {0,102},{24,1},{14,1},{8,1},{4,1},{2,1},{0,131},{0,56},{2,1},{0,117},
  284. {0,132},{4,1},{2,1},{0,72},{0,144},{0,145},{6,1},{2,1},{0,25},{2,1},
  285. {0,9},{0,118},{2,1},{0,146},{0,41},{14,1},{8,1},{4,1},{2,1},{0,133},
  286. {0,88},{2,1},{0,147},{0,57},{4,1},{2,1},{0,160},{0,10},{0,26},{8,1},
  287. {2,1},{0,162},{2,1},{0,103},{2,1},{0,87},{0,73},{6,1},{2,1},{0,148},
  288. {2,1},{0,119},{0,134},{2,1},{0,161},{2,1},{0,104},{0,149},{220,1},{126,1},
  289. {50,1},{26,1},{12,1},{6,1},{2,1},{0,42},{2,1},{0,89},{0,58},{2,1},
  290. {0,163},{2,1},{0,135},{0,120},{8,1},{4,1},{2,1},{0,164},{0,74},{2,1},
  291. {0,150},{0,105},{4,1},{2,1},{0,176},{0,11},{0,177},{10,1},{4,1},{2,1},
  292. {0,27},{0,178},{2,1},{0,43},{2,1},{0,165},{0,90},{6,1},{2,1},{0,179},
  293. {2,1},{0,166},{0,106},{4,1},{2,1},{0,180},{0,75},{2,1},{0,12},{0,193},
  294. {30,1},{14,1},{6,1},{4,1},{2,1},{0,181},{0,194},{0,44},{4,1},{2,1},
  295. {0,167},{0,195},{2,1},{0,107},{0,196},{8,1},{2,1},{0,29},{4,1},{2,1},
  296. {0,136},{0,151},{0,59},{4,1},{2,1},{0,209},{0,210},{2,1},{0,45},{0,211},
  297. {18,1},{6,1},{4,1},{2,1},{0,30},{0,46},{0,226},{6,1},{4,1},{2,1},
  298. {0,121},{0,152},{0,192},{2,1},{0,28},{2,1},{0,137},{0,91},{14,1},{6,1},
  299. {2,1},{0,60},{2,1},{0,122},{0,182},{4,1},{2,1},{0,76},{0,153},{2,1},
  300. {0,168},{0,138},{6,1},{2,1},{0,13},{2,1},{0,197},{0,92},{4,1},{2,1},
  301. {0,61},{0,198},{2,1},{0,108},{0,154},{88,1},{86,1},{36,1},{16,1},{8,1},
  302. {4,1},{2,1},{0,139},{0,77},{2,1},{0,199},{0,124},{4,1},{2,1},{0,213},
  303. {0,93},{2,1},{0,224},{0,14},{8,1},{2,1},{0,227},{4,1},{2,1},{0,208},
  304. {0,183},{0,123},{6,1},{4,1},{2,1},{0,169},{0,184},{0,212},{2,1},{0,225},
  305. {2,1},{0,170},{0,185},{24,1},{10,1},{6,1},{4,1},{2,1},{0,155},{0,214},
  306. {0,109},{2,1},{0,62},{0,200},{6,1},{4,1},{2,1},{0,140},{0,228},{0,78},
  307. {4,1},{2,1},{0,215},{0,229},{2,1},{0,186},{0,171},{12,1},{4,1},{2,1},
  308. {0,156},{0,230},{4,1},{2,1},{0,110},{0,216},{2,1},{0,141},{0,187},{8,1},
  309. {4,1},{2,1},{0,231},{0,157},{2,1},{0,232},{0,142},{4,1},{2,1},{0,203},
  310. {0,188},{0,158},{0,241},{2,1},{0,31},{2,1},{0,15},{0,47},{66,1},{56,1},
  311. {2,1},{0,242},{52,1},{50,1},{20,1},{8,1},{2,1},{0,189},{2,1},{0,94},
  312. {2,1},{0,125},{0,201},{6,1},{2,1},{0,202},{2,1},{0,172},{0,126},{4,1},
  313. {2,1},{0,218},{0,173},{0,204},{10,1},{6,1},{2,1},{0,174},{2,1},{0,219},
  314. {0,220},{2,1},{0,205},{0,190},{6,1},{4,1},{2,1},{0,235},{0,237},{0,238},
  315. {6,1},{4,1},{2,1},{0,217},{0,234},{0,233},{2,1},{0,222},{4,1},{2,1},
  316. {0,221},{0,236},{0,206},{0,63},{0,240},{4,1},{2,1},{0,243},{0,244},{2,1},
  317. {0,79},{2,1},{0,245},{0,95},{10,1},{2,1},{0,255},{4,1},{2,1},{0,246},
  318. {0,111},{2,1},{0,247},{0,127},{12,1},{6,1},{2,1},{0,143},{2,1},{0,248},
  319. {0,249},{4,1},{2,1},{0,159},{0,250},{0,175},{8,1},{4,1},{2,1},{0,251},
  320. {0,191},{2,1},{0,252},{0,207},{4,1},{2,1},{0,253},{0,223},{2,1},{0,254},
  321. {0,239},
  322. };
  323. unsigned char ValTab24[512][2] = {
  324. {60,1},{8,1},{4,1},{2,1},{0,0},{0,16},{2,1},{0,1},{0,17},{14,1},
  325. {6,1},{4,1},{2,1},{0,32},{0,2},{0,33},{2,1},{0,18},{2,1},{0,34},
  326. {2,1},{0,48},{0,3},{14,1},{4,1},{2,1},{0,49},{0,19},{4,1},{2,1},
  327. {0,50},{0,35},{4,1},{2,1},{0,64},{0,4},{0,65},{8,1},{4,1},{2,1},
  328. {0,20},{0,51},{2,1},{0,66},{0,36},{6,1},{4,1},{2,1},{0,67},{0,52},
  329. {0,81},{6,1},{4,1},{2,1},{0,80},{0,5},{0,21},{2,1},{0,82},{0,37},
  330. {250,1},{98,1},{34,1},{18,1},{10,1},{4,1},{2,1},{0,68},{0,83},{2,1},
  331. {0,53},{2,1},{0,96},{0,6},{4,1},{2,1},{0,97},{0,22},{2,1},{0,98},
  332. {0,38},{8,1},{4,1},{2,1},{0,84},{0,69},{2,1},{0,99},{0,54},{4,1},
  333. {2,1},{0,113},{0,85},{2,1},{0,100},{0,70},{32,1},{14,1},{6,1},{2,1},
  334. {0,114},{2,1},{0,39},{0,55},{2,1},{0,115},{4,1},{2,1},{0,112},{0,7},
  335. {0,23},{10,1},{4,1},{2,1},{0,101},{0,86},{4,1},{2,1},{0,128},{0,8},
  336. {0,129},{4,1},{2,1},{0,116},{0,71},{2,1},{0,24},{0,130},{16,1},{8,1},
  337. {4,1},{2,1},{0,40},{0,102},{2,1},{0,131},{0,56},{4,1},{2,1},{0,117},
  338. {0,87},{2,1},{0,132},{0,72},{8,1},{4,1},{2,1},{0,145},{0,25},{2,1},
  339. {0,146},{0,118},{4,1},{2,1},{0,103},{0,41},{2,1},{0,133},{0,88},{92,1},
  340. {34,1},{16,1},{8,1},{4,1},{2,1},{0,147},{0,57},{2,1},{0,148},{0,73},
  341. {4,1},{2,1},{0,119},{0,134},{2,1},{0,104},{0,161},{8,1},{4,1},{2,1},
  342. {0,162},{0,42},{2,1},{0,149},{0,89},{4,1},{2,1},{0,163},{0,58},{2,1},
  343. {0,135},{2,1},{0,120},{0,74},{22,1},{12,1},{4,1},{2,1},{0,164},{0,150},
  344. {4,1},{2,1},{0,105},{0,177},{2,1},{0,27},{0,165},{6,1},{2,1},{0,178},
  345. {2,1},{0,90},{0,43},{2,1},{0,136},{0,179},{16,1},{10,1},{6,1},{2,1},
  346. {0,144},{2,1},{0,9},{0,160},{2,1},{0,151},{0,121},{4,1},{2,1},{0,166},
  347. {0,106},{0,180},{12,1},{6,1},{2,1},{0,26},{2,1},{0,10},{0,176},{2,1},
  348. {0,59},{2,1},{0,11},{0,192},{4,1},{2,1},{0,75},{0,193},{2,1},{0,152},
  349. {0,137},{67,1},{34,1},{16,1},{8,1},{4,1},{2,1},{0,28},{0,181},{2,1},
  350. {0,91},{0,194},{4,1},{2,1},{0,44},{0,167},{2,1},{0,122},{0,195},{10,1},
  351. {6,1},{2,1},{0,60},{2,1},{0,12},{0,208},{2,1},{0,182},{0,107},{4,1},
  352. {2,1},{0,196},{0,76},{2,1},{0,153},{0,168},{16,1},{8,1},{4,1},{2,1},
  353. {0,138},{0,197},{2,1},{0,92},{0,209},{4,1},{2,1},{0,183},{0,123},{2,1},
  354. {0,29},{0,210},{9,1},{4,1},{2,1},{0,45},{0,211},{2,1},{0,61},{0,198},
  355. {85,250},{4,1},{2,1},{0,108},{0,169},{2,1},{0,154},{0,212},{32,1},{16,1},
  356. {8,1},{4,1},{2,1},{0,184},{0,139},{2,1},{0,77},{0,199},{4,1},{2,1},
  357. {0,124},{0,213},{2,1},{0,93},{0,225},{8,1},{4,1},{2,1},{0,30},{0,226},
  358. {2,1},{0,170},{0,185},{4,1},{2,1},{0,155},{0,227},{2,1},{0,214},{0,109},
  359. {20,1},{10,1},{6,1},{2,1},{0,62},{2,1},{0,46},{0,78},{2,1},{0,200},
  360. {0,140},{4,1},{2,1},{0,228},{0,215},{4,1},{2,1},{0,125},{0,171},{0,229},
  361. {10,1},{4,1},{2,1},{0,186},{0,94},{2,1},{0,201},{2,1},{0,156},{0,110},
  362. {8,1},{2,1},{0,230},{2,1},{0,13},{2,1},{0,224},{0,14},{4,1},{2,1},
  363. {0,216},{0,141},{2,1},{0,187},{0,202},{74,1},{2,1},{0,255},{64,1},{58,1},
  364. {32,1},{16,1},{8,1},{4,1},{2,1},{0,172},{0,231},{2,1},{0,126},{0,217},
  365. {4,1},{2,1},{0,157},{0,232},{2,1},{0,142},{0,203},{8,1},{4,1},{2,1},
  366. {0,188},{0,218},{2,1},{0,173},{0,233},{4,1},{2,1},{0,158},{0,204},{2,1},
  367. {0,219},{0,189},{16,1},{8,1},{4,1},{2,1},{0,234},{0,174},{2,1},{0,220},
  368. {0,205},{4,1},{2,1},{0,235},{0,190},{2,1},{0,221},{0,236},{8,1},{4,1},
  369. {2,1},{0,206},{0,237},{2,1},{0,222},{0,238},{0,15},{4,1},{2,1},{0,240},
  370. {0,31},{0,241},{4,1},{2,1},{0,242},{0,47},{2,1},{0,243},{0,63},{18,1},
  371. {8,1},{4,1},{2,1},{0,244},{0,79},{2,1},{0,245},{0,95},{4,1},{2,1},
  372. {0,246},{0,111},{2,1},{0,247},{2,1},{0,127},{0,143},{10,1},{4,1},{2,1},
  373. {0,248},{0,249},{4,1},{2,1},{0,159},{0,175},{0,250},{8,1},{4,1},{2,1},
  374. {0,251},{0,191},{2,1},{0,252},{0,207},{4,1},{2,1},{0,253},{0,223},{2,1},
  375. {0,254},{0,239},
  376. };
  377. unsigned char ValTab32[31][2] = {
  378. {2,1},{0,0},{8,1},{4,1},{2,1},{0,8},{0,4},{2,1},{0,1},{0,2},
  379. {8,1},{4,1},{2,1},{0,12},{0,10},{2,1},{0,3},{0,6},{6,1},{2,1},
  380. {0,9},{2,1},{0,5},{0,7},{4,1},{2,1},{0,14},{0,13},{2,1},{0,15},
  381. {0,11},
  382. };
  383. unsigned char ValTab33[31][2] = {
  384. {16,1},{8,1},{4,1},{2,1},{0,0},{0,1},{2,1},{0,2},{0,3},{4,1},
  385. {2,1},{0,4},{0,5},{2,1},{0,6},{0,7},{8,1},{4,1},{2,1},{0,8},
  386. {0,9},{2,1},{0,10},{0,11},{4,1},{2,1},{0,12},{0,13},{2,1},{0,14},
  387. {0,15},
  388. };
  390. // array of all huffcodtable headers
  391. // 0..31 Huffman code table 0..31
  392. // 32,33 count1-tables
  393. extern struct huffcodetab ht[HTN] = {
  394. {"0",0,0,0,0,-1,NULL,NULL,ValTab0,0},
  395. {"1",2,2,0,0,-1,NULL,NULL,ValTab1,7},
  396. {"2",3,3,0,0,-1,NULL,NULL,ValTab2,17},
  397. {"3",3,3,0,0,-1,NULL,NULL,ValTab3,17},
  398. {"4",0,0,0,0,-1,NULL,NULL,ValTab4,0},
  399. {"5",4,4,0,0,-1,NULL,NULL,ValTab5,31},
  400. {"6",4,4,0,0,-1,NULL,NULL,ValTab6,31},
  401. {"7",6,6,0,0,-1,NULL,NULL,ValTab7,71},
  402. {"8",6,6,0,0,-1,NULL,NULL,ValTab8,71},
  403. {"9",6,6,0,0,-1,NULL,NULL,ValTab9,71},
  404. {"10",8,8,0,0,-1,NULL,NULL,ValTab10,127},
  405. {"11",8,8,0,0,-1,NULL,NULL,ValTab11,127},
  406. {"12",8,8,0,0,-1,NULL,NULL,ValTab12,127},
  407. {"13",16,16,0,0,-1,NULL,NULL,ValTab13,511},
  408. {"14",0,0,0,0,-1,NULL,NULL,ValTab14,0},
  409. {"15",16,16,0,0,-1,NULL,NULL,ValTab15,511},
  410. {"16",16,16,1,1,-1,NULL,NULL,ValTab16,511},
  411. {"17",16,16,2,3,16,NULL,NULL,ValTab16,511},
  412. {"18",16,16,3,7,16,NULL,NULL,ValTab16,511},
  413. {"19",16,16,4,15,16,NULL,NULL,ValTab16,511},
  414. {"20",16,16,6,63,16,NULL,NULL,ValTab16,511},
  415. {"21",16,16,8,255,16,NULL,NULL,ValTab16,511},
  416. {"22",16,16,10,1023,16,NULL,NULL,ValTab16,511},
  417. {"23",16,16,13,8191,16,NULL,NULL,ValTab16,511},
  418. {"24",16,16,4,15,-1,NULL,NULL,ValTab24,512},
  419. {"25",16,16,5,31,24,NULL,NULL,ValTab24,512},
  420. {"26",16,16,6,63,24,NULL,NULL,ValTab24,512},
  421. {"27",16,16,7,127,24,NULL,NULL,ValTab24,512},
  422. {"28",16,16,8,255,24,NULL,NULL,ValTab24,512},
  423. {"29",16,16,9,511,24,NULL,NULL,ValTab24,512},
  424. {"30",16,16,11,2047,24,NULL,NULL,ValTab24,512},
  425. {"31",16,16,13,8191,24,NULL,NULL,ValTab24,512},
  426. {"32",1,16,0,0,-1,NULL,NULL,ValTab32,31},
  427. {"33",1,16,0,0,-1,NULL,NULL,ValTab33,31},
  428. };
  430. // do the huffman-decoding
  431. // note! for counta,countb -the 4 bit value is returned in y,
  432. // discard x
  433. int32 huffman_decoder(struct huffcodetab *h, int32 *x, int32 *y, int32 *v,
  434.  int32 *w, Bit_Reserve *br)
  435. {
  436.   HUFFBITS level;
  437.   int32 point = 0;
  438.   int32 error = 1;
  439.   level     = dmask;
  441.   if (h->val == NULL) return 2;
  443.   /* table 0 needs no bits */
  444.   if ( h->treelen == 0)
  445.   {  *x = *y = 0;
  446.   return 0;
  447.   }
  449.   /* Lookup in Huffman table. */
  451.   do {
  452.  if (h->val[point][0]==0) {   /*end of tree*/
  453. *x = h->val[point][1] >> 4;
  454. *y = h->val[point][1] & 0xf;
  456. error = 0;
  457. break;
  458.  }
  459.  if (br->hget1bit()) {
  460. while (h->val[point][1] >= MXOFF) point += h->val[point][1];
  461. point += h->val[point][1];
  462.  }
  463.  else {
  464. while (h->val[point][0] >= MXOFF) point += h->val[point][0];
  465. point += h->val[point][0];
  466.  }
  467.  level >>= 1;
  468.   } while (level  || (point < ht->treelen) );
  470.   // Check for error.
  472. /*  if (error) { // set x and y to a medium value as a simple concealment
  473.  printf("Illegal Huffman code in data.n");
  474.  *x = (h->xlen-1 << 1);
  475.  *y = (h->ylen-1 << 1);
  476.   } */
  478.   /* Process sign encodings for quadruples tables. */
  480.   if (h->tablename[0] == '3'
  481. && (h->tablename[1] == '2' || h->tablename[1] == '3')) {
  482.   *v = (*y>>3) & 1;
  483.   *w = (*y>>2) & 1;
  484.   *x = (*y>>1) & 1;
  485.   *y = *y & 1;
  487.   /* v, w, x and y are reversed in the bitstream.
  488.   switch them around to make test bistream work. */
  490.   if (*v)
  491.      if (br->hget1bit()) *v = -*v;
  492.   if (*w)
  493.   if (br->hget1bit()) *w = -*w;
  494.   if (*x)
  495.   if (br->hget1bit()) *x = -*x;
  496.   if (*y)
  497.   if (br->hget1bit()) *y = -*y;
  498.   } else {
  500.  // Process sign and escape encodings for dual tables.
  502. // x and y are reversed in the test bitstream.
  503. // Reverse x and y here to make test bitstream work.
  505.   if (h->linbits)
  506.  if ((h->xlen-1) == *x)
  507. *x += br->hgetbits(h->linbits);
  508.   if (*x)
  509.   if (br->hget1bit()) *x = -*x;
  510.   if (h->linbits)
  511.  if ((h->ylen-1) == *y)
  512. *y += br->hgetbits(h->linbits);
  513.   if (*y)
  514.   if (br->hget1bit()) *y = -*y;
  515.   }
  517.   return error;
  518. }