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The JUCE cross-platform C++ framework, with DISTRHO/KXStudio specific changes
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JUCE/modules/juce_audio_formats/codecs/oggvorbis/bitwise.c

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  1. /********************************************************************

  2.  *                                                                  *

  3.  * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *

  4.  * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *

  5.  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *

  6.  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *

  7.  *                                                                  *

  8.  * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2002             *

  9.  * by the Xiph.Org Foundation http://www.xiph.org/                  *

  10.  *                                                                  *

  11.  ********************************************************************

  12. 

  13.   function: packing variable sized words into an octet stream

  14.   last mod: $Id: bitwise.c,v 1.1 2007/06/07 17:48:18 jules_rms Exp $

  15. 

  16.  ********************************************************************/

  17. 

  18. #ifdef JUCE_MSVC

  19.  #pragma warning (disable: 4456 4457 4459)

  20. #endif

  21. 

  22. /* We're 'LSb' endian; if we write a word but read individual bits,

  23.    then we'll read the lsb first */

  24. 

  25. #include <string.h>

  26. #include <stdlib.h>

  27. #include "ogg.h"

  28. 

  29. #define BUFFER_INCREMENT 256

  30. 

  31. static const unsigned long mask[]=

  32. {0x00000000,0x00000001,0x00000003,0x00000007,0x0000000f,

  33.  0x0000001f,0x0000003f,0x0000007f,0x000000ff,0x000001ff,

  34.  0x000003ff,0x000007ff,0x00000fff,0x00001fff,0x00003fff,

  35.  0x00007fff,0x0000ffff,0x0001ffff,0x0003ffff,0x0007ffff,

  36.  0x000fffff,0x001fffff,0x003fffff,0x007fffff,0x00ffffff,

  37.  0x01ffffff,0x03ffffff,0x07ffffff,0x0fffffff,0x1fffffff,

  38.  0x3fffffff,0x7fffffff,0xffffffff };

  39. 

  40. static const unsigned int mask8B[]=

  41. {0x00,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff};

  42. 

  43. void oggpack_writeinit(oggpack_buffer *b){

  44.   memset(b,0,sizeof(*b));

  45.   b->ptr=b->buffer=(unsigned char*) _ogg_malloc(BUFFER_INCREMENT);

  46.   b->buffer[0]='\0';

  47.   b->storage=BUFFER_INCREMENT;

  48. }

  49. 

  50. void oggpackB_writeinit(oggpack_buffer *b){

  51.   oggpack_writeinit(b);

  52. }

  53. 

  54. void oggpack_writetrunc(oggpack_buffer *b,long bits){

  55.   long bytes=bits>>3;

  56.   bits-=bytes*8;

  57.   b->ptr=b->buffer+bytes;

  58.   b->endbit=bits;

  59.   b->endbyte=bytes;

  60.   *b->ptr&=mask[bits];

  61. }

  62. 

  63. void oggpackB_writetrunc(oggpack_buffer *b,long bits){

  64.   long bytes=bits>>3;

  65.   bits-=bytes*8;

  66.   b->ptr=b->buffer+bytes;

  67.   b->endbit=bits;

  68.   b->endbyte=bytes;

  69.   *b->ptr&=mask8B[bits];

  70. }

  71. 

  72. /* Takes only up to 32 bits. */

  73. void oggpack_write(oggpack_buffer *b,unsigned long value,int bits){

  74.   if(b->endbyte+4>=b->storage){

  75.     b->buffer=(unsigned char*) _ogg_realloc(b->buffer,b->storage+BUFFER_INCREMENT);

  76.     b->storage+=BUFFER_INCREMENT;

  77.     b->ptr=b->buffer+b->endbyte;

  78.   }

  79. 

  80.   value&=mask[bits];

  81.   bits+=b->endbit;

  82. 

  83.   b->ptr[0]|=value<<b->endbit;

  84. 

  85.   if(bits>=8){

  86.     b->ptr[1]=(unsigned char)(value>>(8-b->endbit));

  87.     if(bits>=16){

  88.       b->ptr[2]=(unsigned char)(value>>(16-b->endbit));

  89.       if(bits>=24){

  90. 	b->ptr[3]=(unsigned char)(value>>(24-b->endbit));

  91. 	if(bits>=32){

  92. 	  if(b->endbit)

  93. 	    b->ptr[4]=(unsigned char)(value>>(32-b->endbit));

  94. 	  else

  95. 	    b->ptr[4]=0;

  96. 	}

  97.       }

  98.     }

  99.   }

  100. 

  101.   b->endbyte+=bits/8;

  102.   b->ptr+=bits/8;

  103.   b->endbit=bits&7;

  104. }

  105. 

  106. /* Takes only up to 32 bits. */

  107. void oggpackB_write(oggpack_buffer *b,unsigned long value,int bits){

  108.   if(b->endbyte+4>=b->storage){

  109.     b->buffer=(unsigned char*) _ogg_realloc(b->buffer,b->storage+BUFFER_INCREMENT);

  110.     b->storage+=BUFFER_INCREMENT;

  111.     b->ptr=b->buffer+b->endbyte;

  112.   }

  113. 

  114.   value=(value&mask[bits])<<(32-bits);

  115.   bits+=b->endbit;

  116. 

  117.   b->ptr[0]|=value>>(24+b->endbit);

  118. 

  119.   if(bits>=8){

  120.     b->ptr[1]=(unsigned char)(value>>(16+b->endbit));

  121.     if(bits>=16){

  122.       b->ptr[2]=(unsigned char)(value>>(8+b->endbit));

  123.       if(bits>=24){

  124. 	b->ptr[3]=(unsigned char)(value>>(b->endbit));

  125. 	if(bits>=32){

  126. 	  if(b->endbit)

  127. 	    b->ptr[4]=(unsigned char)(value<<(8-b->endbit));

  128. 	  else

  129. 	    b->ptr[4]=0;

  130. 	}

  131.       }

  132.     }

  133.   }

  134. 

  135.   b->endbyte+=bits/8;

  136.   b->ptr+=bits/8;

  137.   b->endbit=bits&7;

  138. }

  139. 

  140. void oggpack_writealign(oggpack_buffer *b){

  141.   int bits=8-b->endbit;

  142.   if(bits<8)

  143.     oggpack_write(b,0,bits);

  144. }

  145. 

  146. void oggpackB_writealign(oggpack_buffer *b){

  147.   int bits=8-b->endbit;

  148.   if(bits<8)

  149.     oggpackB_write(b,0,bits);

  150. }

  151. 

  152. static void oggpack_writecopy_helper(oggpack_buffer *b,

  153. 				     void *source,

  154. 				     long bits,

  155. 				     void (*w)(oggpack_buffer *,

  156. 					       unsigned long,

  157. 					       int),

  158. 				     int msb){

  159.   unsigned char *ptr=(unsigned char *)source;

  160. 

  161.   long bytes=bits/8;

  162.   bits-=bytes*8;

  163. 

  164.   if(b->endbit){

  165.     int i;

  166.     /* unaligned copy.  Do it the hard way. */

  167.     for(i=0;i<bytes;i++)

  168.       w(b,(unsigned long)(ptr[i]),8);

  169.   }else{

  170.     /* aligned block copy */

  171.     if(b->endbyte+bytes+1>=b->storage){

  172.       b->storage=b->endbyte+bytes+BUFFER_INCREMENT;

  173.       b->buffer=(unsigned char*) _ogg_realloc(b->buffer,b->storage);

  174.       b->ptr=b->buffer+b->endbyte;

  175.     }

  176. 

  177.     memmove(b->ptr,source,bytes);

  178.     b->ptr+=bytes;

  179.     b->endbyte+=bytes;

  180.     *b->ptr=0;

  181. 

  182.   }

  183.   if(bits){

  184.     if(msb)

  185.       w(b,(unsigned long)(ptr[bytes]>>(8-bits)),bits);

  186.     else

  187.       w(b,(unsigned long)(ptr[bytes]),bits);

  188.   }

  189. }

  190. 

  191. void oggpack_writecopy(oggpack_buffer *b,void *source,long bits){

  192.   oggpack_writecopy_helper(b,source,bits,oggpack_write,0);

  193. }

  194. 

  195. void oggpackB_writecopy(oggpack_buffer *b,void *source,long bits){

  196.   oggpack_writecopy_helper(b,source,bits,oggpackB_write,1);

  197. }

  198. 

  199. void oggpack_reset(oggpack_buffer *b){

  200.   b->ptr=b->buffer;

  201.   b->buffer[0]=0;

  202.   b->endbit=b->endbyte=0;

  203. }

  204. 

  205. void oggpackB_reset(oggpack_buffer *b){

  206.   oggpack_reset(b);

  207. }

  208. 

  209. void oggpack_writeclear(oggpack_buffer *b){

  210.   _ogg_free(b->buffer);

  211.   memset(b,0,sizeof(*b));

  212. }

  213. 

  214. void oggpackB_writeclear(oggpack_buffer *b){

  215.   oggpack_writeclear(b);

  216. }

  217. 

  218. void oggpack_readinit(oggpack_buffer *b,unsigned char *buf,int bytes){

  219.   memset(b,0,sizeof(*b));

  220.   b->buffer=b->ptr=buf;

  221.   b->storage=bytes;

  222. }

  223. 

  224. void oggpackB_readinit(oggpack_buffer *b,unsigned char *buf,int bytes){

  225.   oggpack_readinit(b,buf,bytes);

  226. }

  227. 

  228. /* Read in bits without advancing the bitptr; bits <= 32 */

  229. long oggpack_look(oggpack_buffer *b,int bits){

  230.   unsigned long ret;

  231.   unsigned long m=mask[bits];

  232. 

  233.   bits+=b->endbit;

  234. 

  235.   if(b->endbyte+4>=b->storage){

  236.     /* not the main path */

  237.     if(b->endbyte*8+bits>b->storage*8)return(-1);

  238.   }

  239. 

  240.   ret=b->ptr[0]>>b->endbit;

  241.   if(bits>8){

  242.     ret|=b->ptr[1]<<(8-b->endbit);

  243.     if(bits>16){

  244.       ret|=b->ptr[2]<<(16-b->endbit);

  245.       if(bits>24){

  246. 	ret|=b->ptr[3]<<(24-b->endbit);

  247. 	if(bits>32 && b->endbit)

  248. 	  ret|=b->ptr[4]<<(32-b->endbit);

  249.       }

  250.     }

  251.   }

  252.   return(m&ret);

  253. }

  254. 

  255. /* Read in bits without advancing the bitptr; bits <= 32 */

  256. long oggpackB_look(oggpack_buffer *b,int bits){

  257.   unsigned long ret;

  258.   int m=32-bits;

  259. 

  260.   bits+=b->endbit;

  261. 

  262.   if(b->endbyte+4>=b->storage){

  263.     /* not the main path */

  264.     if(b->endbyte*8+bits>b->storage*8)return(-1);

  265.   }

  266. 

  267.   ret=b->ptr[0]<<(24+b->endbit);

  268.   if(bits>8){

  269.     ret|=b->ptr[1]<<(16+b->endbit);

  270.     if(bits>16){

  271.       ret|=b->ptr[2]<<(8+b->endbit);

  272.       if(bits>24){

  273. 	ret|=b->ptr[3]<<(b->endbit);

  274. 	if(bits>32 && b->endbit)

  275. 	  ret|=b->ptr[4]>>(8-b->endbit);

  276.       }

  277.     }

  278.   }

  279.   return ((ret&0xffffffff)>>(m>>1))>>((m+1)>>1);

  280. }

  281. 

  282. long oggpack_look1(oggpack_buffer *b){

  283.   if(b->endbyte>=b->storage)return(-1);

  284.   return((b->ptr[0]>>b->endbit)&1);

  285. }

  286. 

  287. long oggpackB_look1(oggpack_buffer *b){

  288.   if(b->endbyte>=b->storage)return(-1);

  289.   return((b->ptr[0]>>(7-b->endbit))&1);

  290. }

  291. 

  292. void oggpack_adv(oggpack_buffer *b,int bits){

  293.   bits+=b->endbit;

  294.   b->ptr+=bits/8;

  295.   b->endbyte+=bits/8;

  296.   b->endbit=bits&7;

  297. }

  298. 

  299. void oggpackB_adv(oggpack_buffer *b,int bits){

  300.   oggpack_adv(b,bits);

  301. }

  302. 

  303. void oggpack_adv1(oggpack_buffer *b){

  304.   if(++(b->endbit)>7){

  305.     b->endbit=0;

  306.     b->ptr++;

  307.     b->endbyte++;

  308.   }

  309. }

  310. 

  311. void oggpackB_adv1(oggpack_buffer *b){

  312.   oggpack_adv1(b);

  313. }

  314. 

  315. /* bits <= 32 */

  316. long oggpack_read(oggpack_buffer *b,int bits){

  317.   long ret;

  318.   unsigned long m=mask[bits];

  319. 

  320.   bits+=b->endbit;

  321. 

  322.   if(b->endbyte+4>=b->storage){

  323.     /* not the main path */

  324.     ret=-1L;

  325.     if(b->endbyte*8+bits>b->storage*8)goto overflow;

  326.   }

  327. 

  328.   ret=b->ptr[0]>>b->endbit;

  329.   if(bits>8){

  330.     ret|=b->ptr[1]<<(8-b->endbit);

  331.     if(bits>16){

  332.       ret|=b->ptr[2]<<(16-b->endbit);

  333.       if(bits>24){

  334. 	ret|=b->ptr[3]<<(24-b->endbit);

  335. 	if(bits>32 && b->endbit){

  336. 	  ret|=b->ptr[4]<<(32-b->endbit);

  337. 	}

  338.       }

  339.     }

  340.   }

  341.   ret&=m;

  342. 

  343.  overflow:

  344. 

  345.   b->ptr+=bits/8;

  346.   b->endbyte+=bits/8;

  347.   b->endbit=bits&7;

  348.   return(ret);

  349. }

  350. 

  351. /* bits <= 32 */

  352. long oggpackB_read(oggpack_buffer *b,int bits){

  353.   long ret;

  354.   long m=32-bits;

  355. 

  356.   bits+=b->endbit;

  357. 

  358.   if(b->endbyte+4>=b->storage){

  359.     /* not the main path */

  360.     ret=-1L;

  361.     if(b->endbyte*8+bits>b->storage*8)goto overflow;

  362.   }

  363. 

  364.   ret=b->ptr[0]<<(24+b->endbit);

  365.   if(bits>8){

  366.     ret|=b->ptr[1]<<(16+b->endbit);

  367.     if(bits>16){

  368.       ret|=b->ptr[2]<<(8+b->endbit);

  369.       if(bits>24){

  370. 	ret|=b->ptr[3]<<(b->endbit);

  371. 	if(bits>32 && b->endbit)

  372. 	  ret|=b->ptr[4]>>(8-b->endbit);

  373.       }

  374.     }

  375.   }

  376.   ret=((ret&0xffffffffUL)>>(m>>1))>>((m+1)>>1);

  377. 

  378.  overflow:

  379. 

  380.   b->ptr+=bits/8;

  381.   b->endbyte+=bits/8;

  382.   b->endbit=bits&7;

  383.   return(ret);

  384. }

  385. 

  386. long oggpack_read1(oggpack_buffer *b){

  387.   long ret;

  388. 

  389.   if(b->endbyte>=b->storage){

  390.     /* not the main path */

  391.     ret=-1L;

  392.     goto overflow;

  393.   }

  394. 

  395.   ret=(b->ptr[0]>>b->endbit)&1;

  396. 

  397.  overflow:

  398. 

  399.   b->endbit++;

  400.   if(b->endbit>7){

  401.     b->endbit=0;

  402.     b->ptr++;

  403.     b->endbyte++;

  404.   }

  405.   return(ret);

  406. }

  407. 

  408. long oggpackB_read1(oggpack_buffer *b){

  409.   long ret;

  410. 

  411.   if(b->endbyte>=b->storage){

  412.     /* not the main path */

  413.     ret=-1L;

  414.     goto overflow;

  415.   }

  416. 

  417.   ret=(b->ptr[0]>>(7-b->endbit))&1;

  418. 

  419.  overflow:

  420. 

  421.   b->endbit++;

  422.   if(b->endbit>7){

  423.     b->endbit=0;

  424.     b->ptr++;

  425.     b->endbyte++;

  426.   }

  427.   return(ret);

  428. }

  429. 

  430. long oggpack_bytes(oggpack_buffer *b){

  431.   return(b->endbyte+(b->endbit+7)/8);

  432. }

  433. 

  434. long oggpack_bits(oggpack_buffer *b){

  435.   return(b->endbyte*8+b->endbit);

  436. }

  437. 

  438. long oggpackB_bytes(oggpack_buffer *b){

  439.   return oggpack_bytes(b);

  440. }

  441. 

  442. long oggpackB_bits(oggpack_buffer *b){

  443.   return oggpack_bits(b);

  444. }

  445. 

  446. unsigned char *oggpack_get_buffer(oggpack_buffer *b){

  447.   return(b->buffer);

  448. }

  449. 

  450. unsigned char *oggpackB_get_buffer(oggpack_buffer *b){

  451.   return oggpack_get_buffer(b);

  452. }

  453. 

  454. /* Self test of the bitwise routines; everything else is based on

  455.    them, so they damned well better be solid. */

  456. 

  457. #ifdef _V_SELFTEST

  458. #include <stdio.h>

  459. 

  460. static int ilog(unsigned int v){

  461.   int ret=0;

  462.   while(v){

  463.     ret++;

  464.     v>>=1;

  465.   }

  466.   return(ret);

  467. }

  468. 

  469. oggpack_buffer o;

  470. oggpack_buffer r;

  471. 

  472. void report(char *in){

  473.   fprintf(stderr,"%s",in);

  474.   exit(1);

  475. }

  476. 

  477. void cliptest(unsigned long *b,int vals,int bits,int *comp,int compsize){

  478.   long bytes,i;

  479.   unsigned char *buffer;

  480. 

  481.   oggpack_reset(&o);

  482.   for(i=0;i<vals;i++)

  483.     oggpack_write(&o,b[i],bits?bits:ilog(b[i]));

  484.   buffer=oggpack_get_buffer(&o);

  485.   bytes=oggpack_bytes(&o);

  486.   if(bytes!=compsize)report("wrong number of bytes!\n");

  487.   for(i=0;i<bytes;i++)if(buffer[i]!=comp[i]){

  488.     for(i=0;i<bytes;i++)fprintf(stderr,"%x %x\n",(int)buffer[i],(int)comp[i]);

  489.     report("wrote incorrect value!\n");

  490.   }

  491.   oggpack_readinit(&r,buffer,bytes);

  492.   for(i=0;i<vals;i++){

  493.     int tbit=bits?bits:ilog(b[i]);

  494.     if(oggpack_look(&r,tbit)==-1)

  495.       report("out of data!\n");

  496.     if(oggpack_look(&r,tbit)!=(b[i]&mask[tbit]))

  497.       report("looked at incorrect value!\n");

  498.     if(tbit==1)

  499.       if(oggpack_look1(&r)!=(b[i]&mask[tbit]))

  500. 	report("looked at single bit incorrect value!\n");

  501.     if(tbit==1){

  502.       if(oggpack_read1(&r)!=(b[i]&mask[tbit]))

  503. 	report("read incorrect single bit value!\n");

  504.     }else{

  505.     if(oggpack_read(&r,tbit)!=(b[i]&mask[tbit]))

  506.       report("read incorrect value!\n");

  507.     }

  508.   }

  509.   if(oggpack_bytes(&r)!=bytes)report("leftover bytes after read!\n");

  510. }

  511. 

  512. void cliptestB(unsigned long *b,int vals,int bits,int *comp,int compsize){

  513.   long bytes,i;

  514.   unsigned char *buffer;

  515. 

  516.   oggpackB_reset(&o);

  517.   for(i=0;i<vals;i++)

  518.     oggpackB_write(&o,b[i],bits?bits:ilog(b[i]));

  519.   buffer=oggpackB_get_buffer(&o);

  520.   bytes=oggpackB_bytes(&o);

  521.   if(bytes!=compsize)report("wrong number of bytes!\n");

  522.   for(i=0;i<bytes;i++)if(buffer[i]!=comp[i]){

  523.     for(i=0;i<bytes;i++)fprintf(stderr,"%x %x\n",(int)buffer[i],(int)comp[i]);

  524.     report("wrote incorrect value!\n");

  525.   }

  526.   oggpackB_readinit(&r,buffer,bytes);

  527.   for(i=0;i<vals;i++){

  528.     int tbit=bits?bits:ilog(b[i]);

  529.     if(oggpackB_look(&r,tbit)==-1)

  530.       report("out of data!\n");

  531.     if(oggpackB_look(&r,tbit)!=(b[i]&mask[tbit]))

  532.       report("looked at incorrect value!\n");

  533.     if(tbit==1)

  534.       if(oggpackB_look1(&r)!=(b[i]&mask[tbit]))

  535. 	report("looked at single bit incorrect value!\n");

  536.     if(tbit==1){

  537.       if(oggpackB_read1(&r)!=(b[i]&mask[tbit]))

  538. 	report("read incorrect single bit value!\n");

  539.     }else{

  540.     if(oggpackB_read(&r,tbit)!=(b[i]&mask[tbit]))

  541.       report("read incorrect value!\n");

  542.     }

  543.   }

  544.   if(oggpackB_bytes(&r)!=bytes)report("leftover bytes after read!\n");

  545. }

  546. 

  547. int main(void){

  548.   unsigned char *buffer;

  549.   long bytes,i;

  550.   static unsigned long testbuffer1[]=

  551.     {18,12,103948,4325,543,76,432,52,3,65,4,56,32,42,34,21,1,23,32,546,456,7,

  552.        567,56,8,8,55,3,52,342,341,4,265,7,67,86,2199,21,7,1,5,1,4};

  553.   int test1size=43;

  554. 

  555.   static unsigned long testbuffer2[]=

  556.     {216531625L,1237861823,56732452,131,3212421,12325343,34547562,12313212,

  557.        1233432,534,5,346435231,14436467,7869299,76326614,167548585,

  558.        85525151,0,12321,1,349528352};

  559.   int test2size=21;

  560. 

  561.   static unsigned long testbuffer3[]=

  562.     {1,0,14,0,1,0,12,0,1,0,0,0,1,1,0,1,0,1,0,1,0,1,0,1,0,1,0,0,1,1,1,1,1,0,0,1,

  563.        0,1,30,1,1,1,0,0,1,0,0,0,12,0,11,0,1,0,0,1};

  564.   int test3size=56;

  565. 

  566.   static unsigned long large[]=

  567.     {2136531625L,2137861823,56732452,131,3212421,12325343,34547562,12313212,

  568.        1233432,534,5,2146435231,14436467,7869299,76326614,167548585,

  569.        85525151,0,12321,1,2146528352};

  570. 

  571.   int onesize=33;

  572.   static int one[33]={146,25,44,151,195,15,153,176,233,131,196,65,85,172,47,40,

  573.                     34,242,223,136,35,222,211,86,171,50,225,135,214,75,172,

  574.                     223,4};

  575.   static int oneB[33]={150,101,131,33,203,15,204,216,105,193,156,65,84,85,222,

  576. 		       8,139,145,227,126,34,55,244,171,85,100,39,195,173,18,

  577. 		       245,251,128};

  578. 

  579.   int twosize=6;

  580.   static int two[6]={61,255,255,251,231,29};

  581.   static int twoB[6]={247,63,255,253,249,120};

  582. 

  583.   int threesize=54;

  584.   static int three[54]={169,2,232,252,91,132,156,36,89,13,123,176,144,32,254,

  585.                       142,224,85,59,121,144,79,124,23,67,90,90,216,79,23,83,

  586.                       58,135,196,61,55,129,183,54,101,100,170,37,127,126,10,

  587.                       100,52,4,14,18,86,77,1};

  588.   static int threeB[54]={206,128,42,153,57,8,183,251,13,89,36,30,32,144,183,

  589. 			 130,59,240,121,59,85,223,19,228,180,134,33,107,74,98,

  590. 			 233,253,196,135,63,2,110,114,50,155,90,127,37,170,104,

  591. 			 200,20,254,4,58,106,176,144,0};

  592. 

  593.   int foursize=38;

  594.   static int four[38]={18,6,163,252,97,194,104,131,32,1,7,82,137,42,129,11,72,

  595.                      132,60,220,112,8,196,109,64,179,86,9,137,195,208,122,169,

  596.                      28,2,133,0,1};

  597.   static int fourB[38]={36,48,102,83,243,24,52,7,4,35,132,10,145,21,2,93,2,41,

  598. 			1,219,184,16,33,184,54,149,170,132,18,30,29,98,229,67,

  599. 			129,10,4,32};

  600. 

  601.   int fivesize=45;

  602.   static int five[45]={169,2,126,139,144,172,30,4,80,72,240,59,130,218,73,62,

  603.                      241,24,210,44,4,20,0,248,116,49,135,100,110,130,181,169,

  604.                      84,75,159,2,1,0,132,192,8,0,0,18,22};

  605.   static int fiveB[45]={1,84,145,111,245,100,128,8,56,36,40,71,126,78,213,226,

  606. 			124,105,12,0,133,128,0,162,233,242,67,152,77,205,77,

  607. 			172,150,169,129,79,128,0,6,4,32,0,27,9,0};

  608. 

  609.   int sixsize=7;

  610.   static int six[7]={17,177,170,242,169,19,148};

  611.   static int sixB[7]={136,141,85,79,149,200,41};

  612. 

  613.   /* Test read/write together */

  614.   /* Later we test against pregenerated bitstreams */

  615.   oggpack_writeinit(&o);

  616. 

  617.   fprintf(stderr,"\nSmall preclipped packing (LSb): ");

  618.   cliptest(testbuffer1,test1size,0,one,onesize);

  619.   fprintf(stderr,"ok.");

  620. 

  621.   fprintf(stderr,"\nNull bit call (LSb): ");

  622.   cliptest(testbuffer3,test3size,0,two,twosize);

  623.   fprintf(stderr,"ok.");

  624. 

  625.   fprintf(stderr,"\nLarge preclipped packing (LSb): ");

  626.   cliptest(testbuffer2,test2size,0,three,threesize);

  627.   fprintf(stderr,"ok.");

  628. 

  629.   fprintf(stderr,"\n32 bit preclipped packing (LSb): ");

  630.   oggpack_reset(&o);

  631.   for(i=0;i<test2size;i++)

  632.     oggpack_write(&o,large[i],32);

  633.   buffer=oggpack_get_buffer(&o);

  634.   bytes=oggpack_bytes(&o);

  635.   oggpack_readinit(&r,buffer,bytes);

  636.   for(i=0;i<test2size;i++){

  637.     if(oggpack_look(&r,32)==-1)report("out of data. failed!");

  638.     if(oggpack_look(&r,32)!=large[i]){

  639.       fprintf(stderr,"%ld != %ld (%lx!=%lx):",oggpack_look(&r,32),large[i],

  640. 	      oggpack_look(&r,32),large[i]);

  641.       report("read incorrect value!\n");

  642.     }

  643.     oggpack_adv(&r,32);

  644.   }

  645.   if(oggpack_bytes(&r)!=bytes)report("leftover bytes after read!\n");

  646.   fprintf(stderr,"ok.");

  647. 

  648.   fprintf(stderr,"\nSmall unclipped packing (LSb): ");

  649.   cliptest(testbuffer1,test1size,7,four,foursize);

  650.   fprintf(stderr,"ok.");

  651. 

  652.   fprintf(stderr,"\nLarge unclipped packing (LSb): ");

  653.   cliptest(testbuffer2,test2size,17,five,fivesize);

  654.   fprintf(stderr,"ok.");

  655. 

  656.   fprintf(stderr,"\nSingle bit unclipped packing (LSb): ");

  657.   cliptest(testbuffer3,test3size,1,six,sixsize);

  658.   fprintf(stderr,"ok.");

  659. 

  660.   fprintf(stderr,"\nTesting read past end (LSb): ");

  661.   oggpack_readinit(&r,"\0\0\0\0\0\0\0\0",8);

  662.   for(i=0;i<64;i++){

  663.     if(oggpack_read(&r,1)!=0){

  664.       fprintf(stderr,"failed; got -1 prematurely.\n");

  665.       exit(1);

  666.     }

  667.   }

  668.   if(oggpack_look(&r,1)!=-1 ||

  669.      oggpack_read(&r,1)!=-1){

  670.       fprintf(stderr,"failed; read past end without -1.\n");

  671.       exit(1);

  672.   }

  673.   oggpack_readinit(&r,"\0\0\0\0\0\0\0\0",8);

  674.   if(oggpack_read(&r,30)!=0 || oggpack_read(&r,16)!=0){

  675.       fprintf(stderr,"failed 2; got -1 prematurely.\n");

  676.       exit(1);

  677.   }

  678. 

  679.   if(oggpack_look(&r,18)!=0 ||

  680.      oggpack_look(&r,18)!=0){

  681.     fprintf(stderr,"failed 3; got -1 prematurely.\n");

  682.       exit(1);

  683.   }

  684.   if(oggpack_look(&r,19)!=-1 ||

  685.      oggpack_look(&r,19)!=-1){

  686.     fprintf(stderr,"failed; read past end without -1.\n");

  687.       exit(1);

  688.   }

  689.   if(oggpack_look(&r,32)!=-1 ||

  690.      oggpack_look(&r,32)!=-1){

  691.     fprintf(stderr,"failed; read past end without -1.\n");

  692.       exit(1);

  693.   }

  694.   oggpack_writeclear(&o);

  695.   fprintf(stderr,"ok.\n");

  696. 

  697.   /********** lazy, cut-n-paste retest with MSb packing ***********/

  698. 

  699.   /* Test read/write together */

  700.   /* Later we test against pregenerated bitstreams */

  701.   oggpackB_writeinit(&o);

  702. 

  703.   fprintf(stderr,"\nSmall preclipped packing (MSb): ");

  704.   cliptestB(testbuffer1,test1size,0,oneB,onesize);

  705.   fprintf(stderr,"ok.");

  706. 

  707.   fprintf(stderr,"\nNull bit call (MSb): ");

  708.   cliptestB(testbuffer3,test3size,0,twoB,twosize);

  709.   fprintf(stderr,"ok.");

  710. 

  711.   fprintf(stderr,"\nLarge preclipped packing (MSb): ");

  712.   cliptestB(testbuffer2,test2size,0,threeB,threesize);

  713.   fprintf(stderr,"ok.");

  714. 

  715.   fprintf(stderr,"\n32 bit preclipped packing (MSb): ");

  716.   oggpackB_reset(&o);

  717.   for(i=0;i<test2size;i++)

  718.     oggpackB_write(&o,large[i],32);

  719.   buffer=oggpackB_get_buffer(&o);

  720.   bytes=oggpackB_bytes(&o);

  721.   oggpackB_readinit(&r,buffer,bytes);

  722.   for(i=0;i<test2size;i++){

  723.     if(oggpackB_look(&r,32)==-1)report("out of data. failed!");

  724.     if(oggpackB_look(&r,32)!=large[i]){

  725.       fprintf(stderr,"%ld != %ld (%lx!=%lx):",oggpackB_look(&r,32),large[i],

  726. 	      oggpackB_look(&r,32),large[i]);

  727.       report("read incorrect value!\n");

  728.     }

  729.     oggpackB_adv(&r,32);

  730.   }

  731.   if(oggpackB_bytes(&r)!=bytes)report("leftover bytes after read!\n");

  732.   fprintf(stderr,"ok.");

  733. 

  734.   fprintf(stderr,"\nSmall unclipped packing (MSb): ");

  735.   cliptestB(testbuffer1,test1size,7,fourB,foursize);

  736.   fprintf(stderr,"ok.");

  737. 

  738.   fprintf(stderr,"\nLarge unclipped packing (MSb): ");

  739.   cliptestB(testbuffer2,test2size,17,fiveB,fivesize);

  740.   fprintf(stderr,"ok.");

  741. 

  742.   fprintf(stderr,"\nSingle bit unclipped packing (MSb): ");

  743.   cliptestB(testbuffer3,test3size,1,sixB,sixsize);

  744.   fprintf(stderr,"ok.");

  745. 

  746.   fprintf(stderr,"\nTesting read past end (MSb): ");

  747.   oggpackB_readinit(&r,"\0\0\0\0\0\0\0\0",8);

  748.   for(i=0;i<64;i++){

  749.     if(oggpackB_read(&r,1)!=0){

  750.       fprintf(stderr,"failed; got -1 prematurely.\n");

  751.       exit(1);

  752.     }

  753.   }

  754.   if(oggpackB_look(&r,1)!=-1 ||

  755.      oggpackB_read(&r,1)!=-1){

  756.       fprintf(stderr,"failed; read past end without -1.\n");

  757.       exit(1);

  758.   }

  759.   oggpackB_readinit(&r,"\0\0\0\0\0\0\0\0",8);

  760.   if(oggpackB_read(&r,30)!=0 || oggpackB_read(&r,16)!=0){

  761.       fprintf(stderr,"failed 2; got -1 prematurely.\n");

  762.       exit(1);

  763.   }

  764. 

  765.   if(oggpackB_look(&r,18)!=0 ||

  766.      oggpackB_look(&r,18)!=0){

  767.     fprintf(stderr,"failed 3; got -1 prematurely.\n");

  768.       exit(1);

  769.   }

  770.   if(oggpackB_look(&r,19)!=-1 ||

  771.      oggpackB_look(&r,19)!=-1){

  772.     fprintf(stderr,"failed; read past end without -1.\n");

  773.       exit(1);

  774.   }

  775.   if(oggpackB_look(&r,32)!=-1 ||

  776.      oggpackB_look(&r,32)!=-1){

  777.     fprintf(stderr,"failed; read past end without -1.\n");

  778.       exit(1);

  779.   }

  780.   oggpackB_writeclear(&o);

  781.   fprintf(stderr,"ok.\n\n");

  782. 

  783. 

  784.   return(0);

  785. }

  786. #endif  /* _V_SELFTEST */

  787. 

  788. #undef BUFFER_INCREMENT