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  44 ライブ・アナーキーさん [] 2015/09/05() 00:25:35.11  
{{板
  白紙に戻して優しい世界にしろ
| 板名 = 奄美実況
| カテゴリ = 隔離
| サーバ = maguro
| フォルダ = liveanarchy
| 開設日 = [[2014年]][[7月2日]]
| 名無しの名前 = 穴カス('''無能''')
| メール欄 = 空白(変更不可)
| ID = 表示なし
| 板URL = http://maguro.2ch.net/mango/
}}
 
 
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<b>
== 戦犯リスト ==
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その他の戦犯はURL参照
 
<u>というかこのWikiを編集しているのは荒らしなので荒らしていたら注意してあげよう。</u>
 
 
<p style="color: red; font-size: 5000%; text-align:center">
        †
</p>
<p style="color: red; font-size: 800%; text-shadow: 3px 3px 2px blue">
  R.I.P 赤座あかり
 
<FONT color="white" style="include-source: http://taruo.net/ip/">💩😅</font>
</p>
 
=='''''<FONT size="7"><big><p style="color:#610B0B; background:#5E610B;">赤座あかりちゃんのチンコバッキバキでワロタwww😓</p></big></font>'''''==
 
 
== 諸注意 ==
 
# なお、ならないことを承知した上で読み進めて下さい。
# 穴実は聞けば教えてくれない厳しい世界です。文化は口伝で脈々と受け継がれています。
 
 
<br/>
<br/>
<br/>
<br/>
<br/><u style="cursor: not-allowed">'''あんなかわいい顔して立派なものつけてるとかぐう興奮する'''</u>
<br/>
<br/>神定期
<br/><s>神定期
<br/>絶やすな
<br/>神定期
<br/>立てた</s>り落としたりしろ
<br/>神定期
/{{#replace:{{#replace:{{{1}}}| |%20}}|\|/}}
<br/>たておとし
<pre style="font-family:MS 明朝,細明朝体;font-size:16px;line-height:16px;border: groove 8px #0000ff;border-right-color: #00ff00;box-shadow: 10px 10px;">
           z─ヽ ∨/   / / |     ハ ト、    ', ∨ノ─z_           
           〈´,   オ /  ./|廴.人、   廴リ斗 ト、} ', 〈   、 /           
           \ / ' |,イ /  /  \'     ∨: N ヽ/            
            l, /ヽ l. ゝ.イ.!,-ヽ//.イ二ニz!,'l/` ゝ              
               l,/ /ヾl`'´ Xニニェ 、////  / . ぃ              
              〕 |  | /.r´// r'' ̄_ヽ    _,/  l |ヽ              
  、          / .|  l/| ゝ.〈   ! イ ⌒i    . !   N.ト、            
   ` 、        /  .И   | 、 J.  ヽ、  ノ し / .,ハ | | ヽ             .
      ヽ    |/|   |  ハ .` 、   し´ヽ ,、_'´ レ ∨|V              
       ヽ    '´∨∨V、   .`.l ー -‐l´ /\ハ/                 
        > -y    ´ `' . ` ̄- y_ ._ ''´      y   ヽ           .  
\      Y ヽ/ _,/   ト、                     ',   ',          
  \    _,j   K     / ヽ_                ',   |          
    ー-'´    jヽ    / (:ぅ              ぅ:)  !   !           
         / ヽ    !                     l   !      /    .
       /    ヽ _,..!                   !  i     /    
     /        <  ',                 `J i   !   /       
  _,. /         ヽ i                    |  !.  /         
_/             ヽ|  J                !   | /          
                v         ,         !  !./           .
                `、        fy        ヽ /           .
                 ',         '     し    y             
    /             ',                 /  し           
    J              ',               /               
                     ',              /                
                       ',       . /|        /               
ヽ                   i      / '、     /                
 ',                  .i   _,ノィう)、     !                i   
  ',                       ', /イY:::i r.、ヽ   !                し  
  ',                 ィヽ彳⌒ !:::j i:::::i r、_ノ                 ..
</pre>
<br/>つまんね
[http://ur
<br/>神定期
<br/>神定期
[http://do
<br/>[http://i.imgur.com/sp4xUKE.jpg]  [http://i.imgur.com/dXZ9Ggz.jpg][http://i.imgur.com/JwlkIz8.jpg]
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<pre style="font-family:IPAMonaPGothic,'IPA モナー Pゴシック',Monapo,Mona,'MS PGothic','MS Pゴシック',sans-serif;font-size:12px;line-height:12px;">
                  xグ
                    //
               _,!{_,.. -- 、
           ,..- ´ ̄-‐ ` ´ -‐-..、 `ヽ、
      __   /   /         `ヽ  ` <二゙ヽ、
    r ´i:::/:/                   ヽ=<j: i
    !ヽ,y::/                      V::ノ
     ヽ::/ /    _,.. -       ―‐-i、    ヾ.ヘ、
   ,ィ´ .j /    / ト、::..     ::. |i::  :::`ヽ ヽ  !::. ヾヽ
    /:. .:::! | i / i ハ :i ヽ.:::::..  |!:./ i:: /ヽ: ii.  i  i::::,-゙
    ヽ!::|  !i i: i !i i _|_t-ミ\::::::::;j|/ x,レ== ミリ:: :. |  i´
     `! !ハ| ト| ,レ゙,ィ ァx゙ `ヽj"   f_, ,ikx ヽi :: リ  i
        !  : !:i i| fi:タiイ::i      i|ィオ::j ノ| j:  :: j
        ! : :.ト、`弋:::゙:ノ       `‐-‐゙ ,リ::: !: j
        ト、:. :iヾ ////     '    //// ij:: j:レi
       !:ヽト、.:!ヽ      r --―ァ     /:: /::::i´
      i::i:ヽ:ヽヽ:::ヽ、   j`i  - ´   ,/::::j/::ルリ
      `゙ ヽ!∨V`i:::::`::/ /._  ,ィクィ:::´リ|/|ノ∨
         ___|/V/ /  /, ' |\_
        ノ::!i:::::::::::::::/ !,// _/:::::::: ̄`ーt-、
         / ヾヽ:::::/   く,つ´ /::::::::::::::::::/ / ヽ
      / i  ヾ,>´       -!..-/::::::::::::::://   ヽ
     /´,i |  /      ,kッ゙:::/:::::::::::://  /     ト、
</pre>
<br/>'''愚かな穴実民よ'''
<br/>穴実の神を崇めよ
<br/>穴実の神を畏れよ
<br/>穴実の神を奉れよ
<br/>
<br/>
<br/>
/**********************************************************************
* ISO MPEG Audio Subgroup Software Simulation Group (1996)
* ISO 13818-3 MPEG-2 Audio Encoder - Lower Sampling Frequency Extension
*
* $Id: encode.c,v 1.1 1996/02/14 04:04:23 rowlands Exp $
*
* $Log: encode.c,v $
* Revision 1.1  1996/02/14 04:04:23  rowlands
* Initial revision
*
* Received from Mike Coleman
**********************************************************************/
/**********************************************************************
*  date  programmers        comment                              *
* 3/01/91  Douglas Wong,      start of version 1.1 records          *
*          Davis Pan                                                *
* 3/06/91  Douglas Wong        rename: setup.h to endef.h            *
*                                      efilter to enfilter          *
*                                      ewindow to enwindow          *
*                              integrated "quantizer", "scalefactor",*
*                              and "transmission" files              *
*                              update routine "window_subband"      *
* 3/31/91  Bill Aspromonte    replaced read_filter by              *
*                              create_an_filter                      *
* 5/10/91  W. Joseph Carter    Ported to Macintosh and Unix.        *
*                              Incorporated Jean-Georges Fritsch's  *
*                              "bitstream.c" package.                *
*                              Incorporated Bill Aspromonte's        *
*                              filterbank coefficient matrix        *
*                              calculation routines and added        *
*                              roundoff to coincide with specs.      *
*                              Modified to strictly adhere to        *
*                              encoded bitstream specs, including    *
*                              "Berlin changes".                    *
*                              Modified PCM sound file handling to  *
*                              process all incoming samples and fill *
*                              out last encoded frame with zeros    *
*                              (silence) if needed.                  *
*                              Located and fixed numerous software  *
*                              bugs and table data errors.          *
* 19jun91  dpwe (Aware)        moved "alloc_*" reader to common.c    *
*                              Globals sblimit, alloc replaced by new*
*                              struct 'frame_params' passed as arg.  *
*                              Added JOINT STEREO coding, layers I,II*
*                              Affects: *_bit_allocation,            *
*                              subband_quantization, encode_bit_alloc*
*                              sample_encoding                      *
* 6/10/91  Earle Jennings      modified II_subband_quantization to  *
*                              resolve type cast problem for MS_DOS  *
* 6/11/91  Earle Jennings      modified to avoid overflow on MS_DOS  *
*                              in routine filter_subband            *
* 7/10/91  Earle Jennings      port to MsDos from MacIntosh version  *
* 8/ 8/91  Jens Spille        Change for MS-C6.00                  *
*10/ 1/91  S.I. Sudharsanan,  Ported to IBM AIX platform.          *
*          Don H. Lee,                                              *
*          Peter W. Farrett                                          *
*10/ 3/91  Don H. Lee          implemented CRC-16 error protection  *
*                              newly introduced function encode_CRC  *
*11/ 8/91  Kathy Wang          Documentation of code                *
*                              All variablenames are referred to    *
*                              with surrounding pound (#) signs      *
* 2/11/92  W. Joseph Carter    Ported new code to Macintosh.  Most  *
*                              important fixes involved changing    *
*                              16-bit ints to long or unsigned in    *
*                              bit alloc routines for quant of 65535 *
*                              and passing proper function args.    *
*                              Removed "Other Joint Stereo" option  *
*                              and made bitrate be total channel    *
*                              bitrate, irrespective of the mode.    *
*                              Fixed many small bugs & reorganized.  *
* 6/16/92  Shaun Astarabadi    Changed I_scale_factor_calc() and    *
*                              II_scale_factor_calc() to use scale  *
*                              factor 0 thru 62 only and not to      *
*                              encode index 63 into the bit stream.  *
* 7/27/92  Mike Li            (re-)Port to MS-DOS                  *
* 9/22/92  jddevine@aware.com  Fixed _scale_factor_calc() defs      *
* 3/31/93  Giogio Dimino      changed II_a_bit_allocation() from:  *
*                              if( ad > ...) to if(ad >= ...)        *
* 8/05/93  TEST                changed I_a_bit_allocation() from:    *
*                              if( ad > ...) to if(ad >= ...)        *
* 8/02/95  mc@fivebats.com    Changed audio file reading code to    *
*                              read samples big-endian              *
*10/15/95  mc@fivebats.com    Modified get_audio() for layer3-LSF  *
**********************************************************************/
#include "common.h"
#include "encoder.h"
 
#ifdef MS_DOS
extern unsigned _stklen = 16384;
#endif
 
 
/*=======================================================================\
|                                                                      |
| This segment contains all the core routines of the encoder,          |
| except for the psychoacoustic models.                                |
|                                                                      |
| The user can select either one of the two psychoacoustic              |
| models. Model I is a simple tonal and noise masking threshold        |
| generator, and Model II is a more sophisticated cochlear masking      |
| threshold generator. Model I is recommended for lower complexity      |
| applications whereas Model II gives better subjective quality at low  |
| bit rates.                                                            |
|                                                                      |
| Layers I and II of mono, stereo, and joint stereo modes are supported.|
| Routines associated with a given layer are prefixed by "I_" for layer |
| 1 and "II_" for layer 2.                                              |
\=======================================================================*/
/************************************************************************
*
* read_samples()
*
* PURPOSE:  reads the PCM samples from a file to the buffer
*
*  SEMANTICS:
* Reads #samples_read# number of shorts from #musicin# filepointer
* into #sample_buffer[]#.  Returns the number of samples read.
*
************************************************************************/
 
unsigned long read_samples(musicin, sample_buffer, num_samples, frame_size)
FILE *musicin;
short sample_buffer[2304];
unsigned long num_samples, frame_size;
{
    unsigned long samples_read;
    static unsigned long samples_to_read;
    static char init = TRUE;
 
    if (init) {
        samples_to_read = num_samples;
        init = FALSE;
    }
    if (samples_to_read >= frame_size)
        samples_read = frame_size;
    else
        samples_read = samples_to_read;
    if ((samples_read =
        fread(sample_buffer, sizeof(short), (int)samples_read, musicin)) == 0)
        printf("Hit end of audio data\n");
    /*
      Samples are big-endian. If this is a little-endian machine
      we must swap
    */
    if ( NativeByteOrder == order_unknown )
      {
NativeByteOrder = DetermineByteOrder();
if ( NativeByteOrder == order_unknown )
  {
    fprintf( stderr, "byte order not determined\n" );
    exit( 1 );
  }
      }
    if ( NativeByteOrder == order_littleEndian )
      SwapBytesInWords( sample_buffer, samples_read );
 
    samples_to_read -= samples_read;
    if (samples_read < frame_size && samples_read > 0) {
        printf("Insufficient PCM input for one frame - fillout with zeros\n");
        for (; samples_read < frame_size; sample_buffer[samples_read++] = 0);
        samples_to_read = 0;
    }
    return(samples_read);
}
 
/************************************************************************
*
* get_audio()
*
* PURPOSE:  reads a frame of audio data from a file to the buffer,
*  aligns the data for future processing, and separates the
*  left and right channels
*
*
************************************************************************/
unsigned long get_audio( musicin, buffer, num_samples, stereo, info )
FILE *musicin;
short FAR buffer[2][1152];
unsigned long num_samples;
int stereo;
layer *info;
{
    int j;
    short insamp[2304];
    unsigned long samples_read;
    int lay;
    lay = info->lay;
 
    if ( (lay == 3) && (info->version == 0) )
    {
if ( stereo == 2 )
{
    samples_read = read_samples( musicin, insamp, num_samples,
(unsigned long) 1152 );
    for ( j = 0; j < 576; j++ )
    {
buffer[0][j] = insamp[2 * j];
buffer[1][j] = insamp[2 * j + 1];
    }
}
else
{
    samples_read = read_samples( musicin, insamp, num_samples,
(unsigned long) 576 );
    for ( j = 0; j < 576; j++ )
    {
buffer[0][j] = insamp[j];
buffer[1][j] = 0;
    }
}
    }
    else
    {
if (lay == 1){
    if(stereo == 2){ /* layer 1, stereo */
samples_read = read_samples(musicin, insamp, num_samples,
    (unsigned long) 768);
for(j=0;j<448;j++) {
    if(j<64) {
buffer[0][j] = buffer[0][j+384];
buffer[1][j] = buffer[1][j+384];
    }
    else {
buffer[0][j] = insamp[2*j-128];
buffer[1][j] = insamp[2*j-127];
    }
}
    }
    else { /* layer 1, mono */
samples_read = read_samples(musicin, insamp, num_samples,
    (unsigned long) 384);
for(j=0;j<448;j++){
    if(j<64) {
buffer[0][j] = buffer[0][j+384];
buffer[1][j] = 0;
    }
    else {
buffer[0][j] = insamp[j-64];
buffer[1][j] = 0;
    }
}
    }
}
else {
    if(stereo == 2){ /* layer 2 (or 3), stereo */
samples_read = read_samples(musicin, insamp, num_samples,
    (unsigned long) 2304);
for(j=0;j<1152;j++) {
    buffer[0][j] = insamp[2*j];
    buffer[1][j] = insamp[2*j+1];
}
    }
    else { /* layer 2 (or 3), mono */
samples_read = read_samples(musicin, insamp, num_samples,
    (unsigned long) 1152);
for(j=0;j<1152;j++){
    buffer[0][j] = insamp[j];
    buffer[1][j] = 0;
}
    }
}
    }
    return(samples_read);
}
/************************************************************************
*
* read_ana_window()
*
* PURPOSE:  Reads encoder window file "enwindow" into array #ana_win#
*
************************************************************************/
void read_ana_window(ana_win)
double FAR ana_win[HAN_SIZE];
{
    int i,j[4];
    FILE *fp;
    double f[4];
    char t[150];
    if (!(fp = OpenTableFile("enwindow") ) ) {
      printf("Please check analysis window table 'enwindow'\n");
      exit(1);
    }
    for (i=0;i<512;i+=4) {
      fgets(t, 150, fp);
      sscanf(t,"C[%d] = %lf C[%d] = %lf C[%d] = %lf C[%d] = %lf\n",
              j, f,j+1,f+1,j+2,f+2,j+3,f+3);
      if (i==j[0]) {
          ana_win[i] = f[0];
          ana_win[i+1] = f[1];
          ana_win[i+2] = f[2];
          ana_win[i+3] = f[3];
      }
      else {
          printf("Check index in analysis window table\n");
          exit(1);
      }
      fgets(t,150,fp);
    }
    fclose(fp);
}
 
/************************************************************************
*
* window_subband()
*
* PURPOSE:  Overlapping window on PCM samples
*
* SEMANTICS:
* 32 16-bit pcm samples are scaled to fractional 2's complement and
* concatenated to the end of the window buffer #x#. The updated window
* buffer #x# is then windowed by the analysis window #c# to produce the
* windowed sample #z#
*
************************************************************************/
void window_subband(buffer, z, k)
short FAR **buffer;
double FAR z[HAN_SIZE];
int k;
{
    typedef double FAR XX[2][HAN_SIZE];
    static XX FAR *x;
    int i, j;
    static off[2] = {0,0};
    static char init = 0;
    static double FAR *c;
    if (!init) {
        c = (double FAR *) mem_alloc(sizeof(double) * HAN_SIZE, "window");
        read_ana_window(c);
        x = (XX FAR *) mem_alloc(sizeof(XX),"x");
        for (i=0;i<2;i++)
            for (j=0;j<HAN_SIZE;j++)
                (*x)[i][j] = 0;
        init = 1;
    }
 
    /* replace 32 oldest samples with 32 new samples */
    for (i=0;i<32;i++) (*x)[k][31-i+off[k]] = (double) *(*buffer)++/SCALE;
    /* shift samples into proper window positions */
    for (i=0;i<HAN_SIZE;i++) z[i] = (*x)[k][(i+off[k])&HAN_SIZE-1] * c[i];
    off[k] += 480;              /*offset is modulo (HAN_SIZE-1)*/
    off[k] &= HAN_SIZE-1;
 
}
/************************************************************************
*
* create_ana_filter()
*
* PURPOSE:  Calculates the analysis filter bank coefficients
*
* SEMANTICS:
* Calculates the analysis filterbank coefficients and rounds to the
* 9th decimal place accuracy of the filterbank tables in the ISO
* document.  The coefficients are stored in #filter#
 
************************************************************************/
void create_ana_filter(filter)
double FAR filter[SBLIMIT][64];
{
  register int i,k;
  for (i=0; i<32; i++)
      for (k=0; k<64; k++) {
          if ((filter[i][k] = 1e9*cos((double)((2*i+1)*(16-k)*PI64))) >= 0)
            modf(filter[i][k]+0.5, &filter[i][k]);
          else
            modf(filter[i][k]-0.5, &filter[i][k]);
          filter[i][k] *= 1e-9;
  }
}
 
/************************************************************************
*
* filter_subband()
*
* PURPOSE:  Calculates the analysis filter bank coefficients
*
* SEMANTICS:
*      The windowed samples #z# is filtered by the digital filter matrix #m#
* to produce the subband samples #s#. This done by first selectively
* picking out values from the windowed samples, and then multiplying
* them by the filter matrix, producing 32 subband samples.
*
************************************************************************/
void filter_subband(z,s)
double FAR z[HAN_SIZE], s[SBLIMIT];
{
  double y[64];
  int i,j;
static char init = 0;
  typedef double MM[SBLIMIT][64];
static MM FAR *m;
#ifdef MS_DOS
  long    SIZE_OF_MM;
  SIZE_OF_MM      = SBLIMIT*64;
  SIZE_OF_MM      *= 8;
  if (!init) {
      m = (MM FAR *) mem_alloc(SIZE_OF_MM, "filter");
      create_ana_filter(*m);
      init = 1;
  }
#else
  if (!init) {
      m = (MM FAR *) mem_alloc(sizeof(MM), "filter");
      create_ana_filter(*m);
      init = 1;
  }
#endif
  for (i=0;i<64;i++) for (j=0, y[i] = 0;j<8;j++) y[i] += z[i+64*j];
  for (i=0;i<SBLIMIT;i++)
      for (j=0, s[i]= 0;j<64;j++) s[i] += (*m)[i][j] * y[j];
}
 
/************************************************************************
* encode_info()
*
* PURPOSE:  Puts the syncword and header information on the output
* bitstream.
*
************************************************************************/
void encode_info(fr_ps,bs)
frame_params *fr_ps;
Bit_stream_struc *bs;
{
        layer *info = fr_ps->header;
        putbits(bs,0xfff,12);                    /* syncword 12 bits */
        put1bit(bs,info->version);              /* ID        1 bit  */
        putbits(bs,4-info->lay,2);              /* layer    2 bits */
        put1bit(bs,!info->error_protection);    /* bit set => no err prot */
        putbits(bs,info->bitrate_index,4);
        putbits(bs,info->sampling_frequency,2);
        put1bit(bs,info->padding);
        put1bit(bs,info->extension);            /* private_bit */
        putbits(bs,info->mode,2);
        putbits(bs,info->mode_ext,2);
        put1bit(bs,info->copyright);
        put1bit(bs,info->original);
        putbits(bs,info->emphasis,2);
}
/************************************************************************
*
* mod()
*
* PURPOSE:  Returns the absolute value of its argument
*
************************************************************************/
double mod(a)
double a;
{
    return (a > 0) ? a : -a;
}
/************************************************************************
*
* I_combine_LR    (Layer I)
* II_combine_LR  (Layer II)
*
* PURPOSE:Combines left and right channels into a mono channel
*
* SEMANTICS:  The average of left and right subband samples is put into
* #joint_sample#
*
* Layer I and II differ in frame length and # subbands used
*
************************************************************************/
void I_combine_LR(sb_sample, joint_sample)
double FAR sb_sample[2][3][SCALE_BLOCK][SBLIMIT];
double FAR joint_sample[3][SCALE_BLOCK][SBLIMIT];
{  /* make a filtered mono for joint stereo */
    int sb, smp;
  for(sb = 0; sb<SBLIMIT; ++sb)
      for(smp = 0; smp<SCALE_BLOCK; ++smp)
        joint_sample[0][smp][sb] = .5 *
                    (sb_sample[0][0][smp][sb] + sb_sample[1][0][smp][sb]);
}
void II_combine_LR(sb_sample, joint_sample, sblimit)
double FAR sb_sample[2][3][SCALE_BLOCK][SBLIMIT];
double FAR joint_sample[3][SCALE_BLOCK][SBLIMIT];
int sblimit;
{  /* make a filtered mono for joint stereo */
  int sb, smp, sufr;
  for(sb = 0; sb<sblimit; ++sb)
      for(smp = 0; smp<SCALE_BLOCK; ++smp)
        for(sufr = 0; sufr<3; ++sufr)
            joint_sample[sufr][smp][sb] = .5 * (sb_sample[0][sufr][smp][sb]
                                          + sb_sample[1][sufr][smp][sb]);
}
/************************************************************************
*
* I_scale_factor_calc    (Layer I)
* II_scale_factor_calc    (Layer II)
*
* PURPOSE:For each subband, calculate the scale factor for each set
* of the 12 subband samples
*
* SEMANTICS:  Pick the scalefactor #multiple[]# just larger than the
* absolute value of the peak subband sample of 12 samples,
* and store the corresponding scalefactor index in #scalar#.
*
* Layer II has three sets of 12-subband samples for a given
* subband.
*
************************************************************************/
void I_scale_factor_calc(sb_sample,scalar,stereo)
double FAR sb_sample[][3][SCALE_BLOCK][SBLIMIT];
unsigned int scalar[][3][SBLIMIT];
int stereo;
{
  int i,j, k;
  double s[SBLIMIT];
  for (k=0;k<stereo;k++) {
    for (i=0;i<SBLIMIT;i++)
      for (j=1, s[i] = mod(sb_sample[k][0][0][i]);j<SCALE_BLOCK;j++)
        if (mod(sb_sample[k][0][j][i]) > s[i])
            s[i] = mod(sb_sample[k][0][j][i]);
    for (i=0;i<SBLIMIT;i++)
      for (j=SCALE_RANGE-2,scalar[k][0][i]=0;j>=0;j--) /* $A 6/16/92 */
        if (s[i] <= multiple[j]) {
            scalar[k][0][i] = j;
            break;
        }
  }
}
 
/******************************** Layer II ******************************/
void II_scale_factor_calc(sb_sample,scalar,stereo,sblimit)
double FAR sb_sample[][3][SCALE_BLOCK][SBLIMIT];
unsigned int scalar[][3][SBLIMIT];
int stereo,sblimit;
{
  int i,j, k,t;
  double s[SBLIMIT];
  for (k=0;k<stereo;k++) for (t=0;t<3;t++) {
    for (i=0;i<sblimit;i++)
      for (j=1, s[i] = mod(sb_sample[k][t][0][i]);j<SCALE_BLOCK;j++)
        if (mod(sb_sample[k][t][j][i]) > s[i])
            s[i] = mod(sb_sample[k][t][j][i]);
  for (i=0;i<sblimit;i++)
    for (j=SCALE_RANGE-2,scalar[k][t][i]=0;j>=0;j--)    /* $A 6/16/92 */
      if (s[i] <= multiple[j]) {
        scalar[k][t][i] = j;
        break;
      }
      for (i=sblimit;i<SBLIMIT;i++) scalar[k][t][i] = SCALE_RANGE-1;
    }
}
 
/************************************************************************
*
* pick_scale  (Layer II)
*
* PURPOSE:For each subband, puts the smallest scalefactor of the 3
* associated with a frame into #max_sc#.  This is used
* used by Psychoacoustic Model I.
* (I would recommend changin max_sc to min_sc)
*
************************************************************************/
void pick_scale(scalar, fr_ps, max_sc)
unsigned int scalar[2][3][SBLIMIT];
frame_params *fr_ps;
double FAR max_sc[2][SBLIMIT];
{
  int i,j,k,max;
  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  for (k=0;k<stereo;k++)
    for (i=0;i<sblimit;max_sc[k][i] = multiple[max],i++)
      for (j=1, max = scalar[k][0][i];j<3;j++)
        if (max > scalar[k][j][i]) max = scalar[k][j][i];
  for (i=sblimit;i<SBLIMIT;i++) max_sc[0][i] = max_sc[1][i] = 1E-20;
}
 
/************************************************************************
*
* put_scale  (Layer I)
*
* PURPOSE:Sets #max_sc# to the scalefactor index in #scalar.
* This is used by Psychoacoustic Model I
*
************************************************************************/
void put_scale(scalar, fr_ps, max_sc)
unsigned int scalar[2][3][SBLIMIT];
frame_params *fr_ps;
double FAR max_sc[2][SBLIMIT];
{
  int i,j,k, max;
  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  for (k=0;k<stereo;k++) for (i=0;i<SBLIMIT;i++)
        max_sc[k][i] = multiple[scalar[k][0][i]];
}
/************************************************************************
*
* II_transmission_pattern (Layer II only)
*
* PURPOSE:For a given subband, determines whether to send 1, 2, or
* all 3 of the scalefactors, and fills in the scalefactor
* select information accordingly
*
* SEMANTICS:  The subbands and channels are classified based on how much
* the scalefactors changes over its three values (corresponding
* to the 3 sets of 12 samples per subband).  The classification
* will send 1 or 2 scalefactors instead of three if the scalefactors
* do not change much.  The scalefactor select information,
* #scfsi#, is filled in accordingly.
*
************************************************************************/
void II_transmission_pattern(scalar, scfsi, fr_ps)
unsigned int scalar[2][3][SBLIMIT];
unsigned int scfsi[2][SBLIMIT];
frame_params *fr_ps;
{
  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  int dscf[2];
  int class[2],i,j,k;
static int pattern[5][5] = {0x123, 0x122, 0x122, 0x133, 0x123,
                            0x113, 0x111, 0x111, 0x444, 0x113,
                            0x111, 0x111, 0x111, 0x333, 0x113,
                            0x222, 0x222, 0x222, 0x333, 0x123,
                            0x123, 0x122, 0x122, 0x133, 0x123};
  for (k=0;k<stereo;k++)
    for (i=0;i<sblimit;i++) {
      dscf[0] =  (scalar[k][0][i]-scalar[k][1][i]);
      dscf[1] =  (scalar[k][1][i]-scalar[k][2][i]);
      for (j=0;j<2;j++) {
        if (dscf[j]<=-3) class[j] = 0;
        else if (dscf[j] > -3 && dscf[j] <0) class[j] = 1;
              else if (dscf[j] == 0) class[j] = 2;
                  else if (dscf[j] > 0 && dscf[j] < 3) class[j] = 3;
                        else class[j] = 4;
      }
      switch (pattern[class[0]][class[1]]) {
        case 0x123 :    scfsi[k][i] = 0;
                        break;
        case 0x122 :    scfsi[k][i] = 3;
                        scalar[k][2][i] = scalar[k][1][i];
                        break;
        case 0x133 :    scfsi[k][i] = 3;
                        scalar[k][1][i] = scalar[k][2][i];
                        break;
        case 0x113 :    scfsi[k][i] = 1;
                        scalar[k][1][i] = scalar[k][0][i];
                        break;
        case 0x111 :    scfsi[k][i] = 2;
                        scalar[k][1][i] = scalar[k][2][i] = scalar[k][0][i];
                        break;
        case 0x222 :    scfsi[k][i] = 2;
                        scalar[k][0][i] = scalar[k][2][i] = scalar[k][1][i];
                        break;
        case 0x333 :    scfsi[k][i] = 2;
                        scalar[k][0][i] = scalar[k][1][i] = scalar[k][2][i];
                        break;
        case 0x444 :    scfsi[k][i] = 2;
                        if (scalar[k][0][i] > scalar[k][2][i])
                              scalar[k][0][i] = scalar[k][2][i];
                        scalar[k][1][i] = scalar[k][2][i] = scalar[k][0][i];
      }
  }
}
/************************************************************************
*
* I_encode_scale  (Layer I)
* II_encode_scale (Layer II)
*
* PURPOSE:The encoded scalar factor information is arranged and
* queued into the output fifo to be transmitted.
*
* For Layer II, the three scale factors associated with
* a given subband and channel are transmitted in accordance
* with the scfsi, which is transmitted first.
*
************************************************************************/
void I_encode_scale(scalar, bit_alloc, fr_ps, bs)
unsigned int scalar[2][3][SBLIMIT];
unsigned int bit_alloc[2][SBLIMIT];
frame_params *fr_ps;
Bit_stream_struc *bs;
{
  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  int i,j;
  for (i=0;i<SBLIMIT;i++) for (j=0;j<stereo;j++)
      if (bit_alloc[j][i]) putbits(bs,scalar[j][0][i],6);
}
/***************************** Layer II  ********************************/
void II_encode_scale(bit_alloc, scfsi, scalar, fr_ps, bs)
unsigned int bit_alloc[2][SBLIMIT], scfsi[2][SBLIMIT];
unsigned int scalar[2][3][SBLIMIT];
frame_params *fr_ps;
Bit_stream_struc *bs;
{
  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  int jsbound = fr_ps->jsbound;
  int i,j,k;
  for (i=0;i<sblimit;i++) for (k=0;k<stereo;k++)
    if (bit_alloc[k][i])  putbits(bs,scfsi[k][i],2);
  for (i=0;i<sblimit;i++) for (k=0;k<stereo;k++)
    if (bit_alloc[k][i])  /* above jsbound, bit_alloc[0][i] == ba[1][i] */
        switch (scfsi[k][i]) {
          case 0: for (j=0;j<3;j++)
                    putbits(bs,scalar[k][j][i],6);
                  break;
          case 1:
          case 3: putbits(bs,scalar[k][0][i],6);
                  putbits(bs,scalar[k][2][i],6);
                  break;
          case 2: putbits(bs,scalar[k][0][i],6);
        }
}
/*=======================================================================\
|                                                                        |
|      The following routines are done after the masking threshold      |
| has been calculated by the fft analysis routines in the Psychoacoustic |
| model. Using the MNR calculated, the actual number of bits allocated  |
| to each subband is found iteratively.                                  |
|                                                                        |
\=======================================================================*/
/************************************************************************
*
* I_bits_for_nonoise  (Layer I)
* II_bits_for_nonoise (Layer II)
*
* PURPOSE:Returns the number of bits required to produce a
* mask-to-noise ratio better or equal to the noise/no_noise threshold.
*
* SEMANTICS:
* bbal = # bits needed for encoding bit allocation
* bsel = # bits needed for encoding scalefactor select information
* banc = # bits needed for ancillary data (header info included)
*
* For each subband and channel, will add bits until one of the
* following occurs:
* - Hit maximum number of bits we can allocate for that subband
* - MNR is better than or equal to the minimum masking level
*  (NOISY_MIN_MNR)
* Then the bits required for scalefactors, scfsi, bit allocation,
* and the subband samples are tallied (#req_bits#) and returned.
*
* (NOISY_MIN_MNR) is the smallest MNR a subband can have before it is
* counted as 'noisy' by the logic which chooses the number of JS
* subbands.
*
* Joint stereo is supported.
*
************************************************************************/
 
static double snr[18] = {0.00, 7.00, 11.00, 16.00, 20.84,
                        25.28, 31.59, 37.75, 43.84,
                        49.89, 55.93, 61.96, 67.98, 74.01,
                        80.03, 86.05, 92.01, 98.01};
 
int I_bits_for_nonoise(perm_smr, fr_ps)
double FAR perm_smr[2][SBLIMIT];
frame_params *fr_ps;
{
  int i,j,k;
  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  int jsbound = fr_ps->jsbound;
  int req_bits = 0;
  /* initial b_anc (header) allocation bits */
  req_bits = 32 + 4 * ( (jsbound * stereo) + (SBLIMIT-jsbound) );
  for(i=0; i<SBLIMIT; ++i)
    for(j=0; j<((i<jsbound)?stereo:1); ++j) {
      for(k=0;k<14; ++k)
        if( (-perm_smr[j][i] + snr[k]) >= NOISY_MIN_MNR)
          break; /* we found enough bits */
        if(stereo == 2 && i >= jsbound)    /* check other JS channel */
          for(;k<14; ++k)
            if( (-perm_smr[1-j][i] + snr[k]) >= NOISY_MIN_MNR) break;
        if(k>0) req_bits += (k+1)*SCALE_BLOCK + 6*((i>=jsbound)?stereo:1);
  }
  return req_bits;
}
/***************************** Layer II  ********************************/
int II_bits_for_nonoise(perm_smr, scfsi, fr_ps)
double FAR perm_smr[2][SBLIMIT];
unsigned int scfsi[2][SBLIMIT];
frame_params *fr_ps;
{
  int sb,ch,ba;
  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  int jsbound = fr_ps->jsbound;
  al_table *alloc = fr_ps->alloc;
  int req_bits = 0, bbal = 0, berr = 0, banc = 32;
  int maxAlloc, sel_bits, sc_bits, smp_bits;
static int sfsPerScfsi[] = { 3,2,1,2 };    /* lookup # sfs per scfsi */
 
  /* added 92-08-11 shn */
  if (fr_ps->header->error_protection) berr=16; else berr=0;
  for (sb=0; sb<jsbound; ++sb)
    bbal += stereo * (*alloc)[sb][0].bits;
  for (sb=jsbound; sb<sblimit; ++sb)
    bbal += (*alloc)[sb][0].bits;
  req_bits = banc + bbal + berr;
  for(sb=0; sb<sblimit; ++sb)
    for(ch=0; ch<((sb<jsbound)?stereo:1); ++ch) {
      maxAlloc = (1<<(*alloc)[sb][0].bits)-1;
      sel_bits = sc_bits = smp_bits = 0;
      for(ba=0;ba<maxAlloc-1; ++ba)
        if( (-perm_smr[ch][sb] + snr[(*alloc)[sb][ba].quant+((ba>0)?1:0)])
            >= NOISY_MIN_MNR)
            break;      /* we found enough bits */
      if(stereo == 2 && sb >= jsbound) /* check other JS channel */
        for(;ba<maxAlloc-1; ++ba)
          if( (-perm_smr[1-ch][sb]+ snr[(*alloc)[sb][ba].quant+((ba>0)?1:0)])
              >= NOISY_MIN_MNR)
            break;
      if(ba>0) {
        smp_bits = SCALE_BLOCK * ((*alloc)[sb][ba].group * (*alloc)[sb][ba].bits);
        /* scale factor bits required for subband */
        sel_bits = 2;
        sc_bits  = 6 * sfsPerScfsi[scfsi[ch][sb]];
        if(stereo == 2 && sb >= jsbound) {
          /* each new js sb has L+R scfsis */
          sel_bits += 2;
          sc_bits  += 6 * sfsPerScfsi[scfsi[1-ch][sb]];
        }
        req_bits += smp_bits+sel_bits+sc_bits;
      }
  }
  return req_bits;
}
/************************************************************************
*
* I_main_bit_allocation  (Layer I)
* II_main_bit_allocation  (Layer II)
*
* PURPOSE:For joint stereo mode, determines which of the 4 joint
* stereo modes is needed.  Then calls *_a_bit_allocation(), which
* allocates bits for each of the subbands until there are no more bits
* left, or the MNR is at the noise/no_noise threshold.
*
* SEMANTICS:
*
* For joint stereo mode, joint stereo is changed to stereo if
* there are enough bits to encode stereo at or better than the
* no-noise threshold (NOISY_MIN_MNR).  Otherwise, the system
* iteratively allocates less bits by using joint stereo until one
* of the following occurs:
* - there are no more noisy subbands (MNR >= NOISY_MIN_MNR)
* - mode_ext has been reduced to 0, which means that all but the
*  lowest 4 subbands have been converted from stereo to joint
*  stereo, and no more subbands may be converted
*
*    This function calls *_bits_for_nonoise() and *_a_bit_allocation().
*
************************************************************************/
void I_main_bit_allocation(perm_smr, bit_alloc, adb, fr_ps)
double FAR perm_smr[2][SBLIMIT];
unsigned int bit_alloc[2][SBLIMIT];
int *adb;
frame_params *fr_ps;
{
  int  noisy_sbs;
  int  mode, mode_ext, lay, i;
  int  rq_db, av_db = *adb;
static  int init = 0;
  if(init == 0) {
    /* rearrange snr for layer I */
    snr[2] = snr[3];
    for (i=3;i<16;i++) snr[i] = snr[i+2];
    init = 1;
  }
  if((mode = fr_ps->actual_mode) == MPG_MD_JOINT_STEREO) {
    fr_ps->header->mode = MPG_MD_STEREO;
    fr_ps->header->mode_ext = 0;
    fr_ps->jsbound = fr_ps->sblimit;
    if(rq_db = I_bits_for_nonoise(perm_smr, fr_ps) > *adb) {
      fr_ps->header->mode = MPG_MD_JOINT_STEREO;
      mode_ext = 4;          /* 3 is least severe reduction */
      lay = fr_ps->header->lay;
      do {
          --mode_ext;
          fr_ps->jsbound = js_bound(lay, mode_ext);
          rq_db = I_bits_for_nonoise(perm_smr, fr_ps);
      } while( (rq_db > *adb) && (mode_ext > 0));
      fr_ps->header->mode_ext = mode_ext;
    }    /* well we either eliminated noisy sbs or mode_ext == 0 */
  }
  noisy_sbs = I_a_bit_allocation(perm_smr, bit_alloc, adb, fr_ps);
}
/***************************** Layer II  ********************************/
void II_main_bit_allocation(perm_smr, scfsi, bit_alloc, adb, fr_ps)
double FAR perm_smr[2][SBLIMIT];
unsigned int scfsi[2][SBLIMIT];
unsigned int bit_alloc[2][SBLIMIT];
int *adb;
frame_params *fr_ps;
{
  int  noisy_sbs, nn;
  int  mode, mode_ext, lay;
  int  rq_db, av_db = *adb;
  if((mode = fr_ps->actual_mode) == MPG_MD_JOINT_STEREO) {
    fr_ps->header->mode = MPG_MD_STEREO;
    fr_ps->header->mode_ext = 0;
    fr_ps->jsbound = fr_ps->sblimit;
    if((rq_db=II_bits_for_nonoise(perm_smr, scfsi, fr_ps)) > *adb) {
      fr_ps->header->mode = MPG_MD_JOINT_STEREO;
      mode_ext = 4;          /* 3 is least severe reduction */
      lay = fr_ps->header->lay;
      do {
        --mode_ext;
        fr_ps->jsbound = js_bound(lay, mode_ext);
        rq_db = II_bits_for_nonoise(perm_smr, scfsi, fr_ps);
      } while( (rq_db > *adb) && (mode_ext > 0));
      fr_ps->header->mode_ext = mode_ext;
    }    /* well we either eliminated noisy sbs or mode_ext == 0 */
  }
  noisy_sbs = II_a_bit_allocation(perm_smr, scfsi, bit_alloc, adb, fr_ps);
}
/************************************************************************
*
* I_a_bit_allocation  (Layer I)
* II_a_bit_allocation (Layer II)
*
* PURPOSE:Adds bits to the subbands with the lowest mask-to-noise
* ratios, until the maximum number of bits for the subband has
* been allocated.
*
* SEMANTICS:
* 1. Find the subband and channel with the smallest MNR (#min_sb#,
*    and #min_ch#)
* 2. Calculate the increase in bits needed if we increase the bit
*    allocation to the next higher level
* 3. If there are enough bits available for increasing the resolution
*    in #min_sb#, #min_ch#, and the subband has not yet reached its
*    maximum allocation, update the bit allocation, MNR, and bits
    available accordingly
* 4. Repeat until there are no more bits left, or no more available
*    subbands. (A subband is still available until the maximum
*    number of bits for the subband has been allocated, or there
*    aren't enough bits to go to the next higher resolution in the
    subband.)
*
************************************************************************/
int I_a_bit_allocation(perm_smr, bit_alloc, adb, fr_ps) /* return noisy sbs */
double FAR perm_smr[2][SBLIMIT];
unsigned int bit_alloc[2][SBLIMIT];
int *adb;
frame_params *fr_ps;
{
  int i, k, smpl_bits, scale_bits, min_sb, min_ch, oth_ch;
  int bspl, bscf, ad, noisy_sbs, done = 0, bbal ;
  double mnr[2][SBLIMIT], small;
  char used[2][SBLIMIT];
  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  int jsbound = fr_ps->jsbound;
  al_table *alloc = fr_ps->alloc;
static char init= 0;
static int banc=32, berr=0;
  if (!init) {
      init = 1;
      if (fr_ps->header->error_protection) berr = 16;  /* added 92-08-11 shn */
  }
  bbal = 4 * ( (jsbound * stereo) + (SBLIMIT-jsbound) );
  *adb -= bbal + berr + banc;
  ad= *adb;
  for (i=0;i<SBLIMIT;i++) for (k=0;k<stereo;k++) {
    mnr[k][i]=snr[0]-perm_smr[k][i];
    bit_alloc[k][i] = 0;
    used[k][i] = 0;
  }
  bspl = bscf = 0;
  do  {
    /* locate the subband with minimum SMR */
    small = mnr[0][0]+1;    min_sb = -1; min_ch = -1;
    for (i=0;i<SBLIMIT;i++) for (k=0;k<stereo;k++)
      /* go on only if there are bits left */
      if (used[k][i] != 2 && small > mnr[k][i]) {
        small = mnr[k][i];
        min_sb = i;  min_ch = k;
      }
    if(min_sb > -1) {  /* there was something to find */
      /* first step of bit allocation is biggest */
      if (used[min_ch][min_sb])  { smpl_bits = SCALE_BLOCK; scale_bits = 0; }
      else                      { smpl_bits = 24; scale_bits = 6; }
      if(min_sb >= jsbound)        scale_bits *= stereo;
      /* check to see enough bits were available for */
      /* increasing resolution in the minimum band */
      if (ad >= bspl + bscf + scale_bits + smpl_bits) {
        bspl += smpl_bits; /* bit for subband sample */
        bscf += scale_bits; /* bit for scale factor */
        bit_alloc[min_ch][min_sb]++;
        used[min_ch][min_sb] = 1; /* subband has bits */
        mnr[min_ch][min_sb] = -perm_smr[min_ch][min_sb]
                              + snr[bit_alloc[min_ch][min_sb]];
        /* Check if subband has been fully allocated max bits */
        if (bit_alloc[min_ch][min_sb] == 14 ) used[min_ch][min_sb] = 2;
      }
      else            /* no room to improve this band */
        used[min_ch][min_sb] = 2; /*  for allocation anymore */
      if(stereo == 2 && min_sb >= jsbound) {
        oth_ch = 1-min_ch;  /* joint-st : fix other ch */
        bit_alloc[oth_ch][min_sb] = bit_alloc[min_ch][min_sb];
        used[oth_ch][min_sb] = used[min_ch][min_sb];
        mnr[oth_ch][min_sb] = -perm_smr[oth_ch][min_sb]
                              + snr[bit_alloc[oth_ch][min_sb]];
      }
    }
  } while(min_sb>-1);    /* i.e. still some sub-bands to find */
 
  /* Calculate the number of bits left, add on to pointed var */
  ad -= bspl+bscf;
  *adb = ad;
 
  /* see how many channels are noisy */
  noisy_sbs = 0; small = mnr[0][0];
  for(k=0; k<stereo; ++k) {
    for(i = 0; i< SBLIMIT; ++i) {
      if(mnr[k][i] < NOISY_MIN_MNR)  ++noisy_sbs;
      if(small > mnr[k][i])          small = mnr[k][i];
    }
  }
  return noisy_sbs;
}
 
/***************************** Layer II  ********************************/
int II_a_bit_allocation(perm_smr, scfsi, bit_alloc, adb, fr_ps)
double FAR perm_smr[2][SBLIMIT];
unsigned int scfsi[2][SBLIMIT];
unsigned int bit_alloc[2][SBLIMIT];
int *adb;
frame_params *fr_ps;
{
  int i, min_ch, min_sb, oth_ch, k, increment, scale, seli, ba;
  int bspl, bscf, bsel, ad, noisy_sbs, bbal=0;
  double mnr[2][SBLIMIT], small;
  char used[2][SBLIMIT];
  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  int jsbound = fr_ps->jsbound;
  al_table *alloc = fr_ps->alloc;
static char init= 0;
static int banc=32, berr=0;
static int sfsPerScfsi[] = { 3,2,1,2 };    /* lookup # sfs per scfsi */
  if (!init) {
      init = 1; 
      if (fr_ps->header->error_protection) berr=16; /* added 92-08-11 shn */
  }
  for (i=0; i<jsbound; ++i)
    bbal += stereo * (*alloc)[i][0].bits;
  for (i=jsbound; i<sblimit; ++i)
    bbal += (*alloc)[i][0].bits;
  *adb -= bbal + berr + banc;
  ad = *adb;
  for (i=0;i<sblimit;i++) for (k=0;k<stereo;k++) {
    mnr[k][i]=snr[0]-perm_smr[k][i];
    bit_alloc[k][i] = 0;
    used[k][i] = 0;
  }
  bspl = bscf = bsel = 0;
  do  {
    /* locate the subband with minimum SMR */
    small = 999999.0; min_sb = -1; min_ch = -1;
    for (i=0;i<sblimit;i++) for(k=0;k<stereo;++k)
      if (used[k][i]  != 2 && small > mnr[k][i]) {
        small = mnr[k][i];
        min_sb = i;  min_ch = k;
    }
    if(min_sb > -1) {  /* there was something to find */
      /* find increase in bit allocation in subband [min] */
      increment = SCALE_BLOCK * ((*alloc)[min_sb][bit_alloc[min_ch][min_sb]+1].group *
                        (*alloc)[min_sb][bit_alloc[min_ch][min_sb]+1].bits);
      if (used[min_ch][min_sb])
        increment -= SCALE_BLOCK * ((*alloc)[min_sb][bit_alloc[min_ch][min_sb]].group*
                          (*alloc)[min_sb][bit_alloc[min_ch][min_sb]].bits);
      /* scale factor bits required for subband [min] */
      oth_ch = 1 - min_ch;    /* above js bound, need both chans */
      if (used[min_ch][min_sb]) scale = seli = 0;
      else {          /* this channel had no bits or scfs before */
        seli = 2;
        scale = 6 * sfsPerScfsi[scfsi[min_ch][min_sb]];
        if(stereo == 2 && min_sb >= jsbound) {
          /* each new js sb has L+R scfsis */
          seli += 2;
          scale += 6 * sfsPerScfsi[scfsi[oth_ch][min_sb]];
        }
      }
      /* check to see enough bits were available for */
      /* increasing resolution in the minimum band */
      if (ad >= bspl + bscf + bsel + seli + scale + increment) {
        ba = ++bit_alloc[min_ch][min_sb]; /* next up alloc */
        bspl += increment;  /* bits for subband sample */
        bscf += scale;      /* bits for scale factor */
        bsel += seli;      /* bits for scfsi code */
        used[min_ch][min_sb] = 1; /* subband has bits */
        mnr[min_ch][min_sb] = -perm_smr[min_ch][min_sb] +
                              snr[(*alloc)[min_sb][ba].quant+1];
        /* Check if subband has been fully allocated max bits */
        if (ba >= (1<<(*alloc)[min_sb][0].bits)-1) used[min_ch][min_sb] = 2;
      }
      else used[min_ch][min_sb] = 2; /* can't increase this alloc */
      if(min_sb >= jsbound && stereo == 2) {
        /* above jsbound, alloc applies L+R */
        ba = bit_alloc[oth_ch][min_sb] = bit_alloc[min_ch][min_sb];
        used[oth_ch][min_sb] = used[min_ch][min_sb];
        mnr[oth_ch][min_sb] = -perm_smr[oth_ch][min_sb] +
                              snr[(*alloc)[min_sb][ba].quant+1];
      }
    }
  } while(min_sb > -1);  /* until could find no channel */
  /* Calculate the number of bits left */
  ad -= bspl+bscf+bsel;  *adb = ad;
  for (i=sblimit;i<SBLIMIT;i++) for (k=0;k<stereo;k++) bit_alloc[k][i]=0;
  noisy_sbs = 0;  small = mnr[0][0];      /* calc worst noise in case */
  for(k=0;k<stereo;++k) {
    for (i=0;i<sblimit;i++) {
      if (small > mnr[k][i]) small = mnr[k][i];
      if(mnr[k][i] < NOISY_MIN_MNR) ++noisy_sbs; /* noise is not masked */
 
    }
  }
  return noisy_sbs;
}
/************************************************************************
*
* I_subband_quantization  (Layer I)
* II_subband_quantization (Layer II)
*
* PURPOSE:Quantizes subband samples to appropriate number of bits
*
* SEMANTICS:  Subband samples are divided by their scalefactors, which
makes the quantization more efficient. The scaled samples are
* quantized by the function a*x+b, where a and b are functions of
* the number of quantization levels. The result is then truncated
* to the appropriate number of bits and the MSB is inverted.
*
* Note that for fractional 2's complement, inverting the MSB for a
negative number x is equivalent to adding 1 to it.
*
************************************************************************/
static double a[17] = {
  0.750000000, 0.625000000, 0.875000000, 0.562500000, 0.937500000,
  0.968750000, 0.984375000, 0.992187500, 0.996093750, 0.998046875,
  0.999023438, 0.999511719, 0.999755859, 0.999877930, 0.999938965,
  0.999969482, 0.999984741 };
static double b[17] = {
  -0.250000000, -0.375000000, -0.125000000, -0.437500000, -0.062500000,
  -0.031250000, -0.015625000, -0.007812500, -0.003906250, -0.001953125,
  -0.000976563, -0.000488281, -0.000244141, -0.000122070, -0.000061035,
  -0.000030518, -0.000015259 };
void I_subband_quantization(scalar, sb_samples, j_scale, j_samps,
                            bit_alloc, sbband, fr_ps)
unsigned int scalar[2][3][SBLIMIT];
double FAR sb_samples[2][3][SCALE_BLOCK][SBLIMIT];
unsigned int j_scale[3][SBLIMIT];
double FAR j_samps[3][SCALE_BLOCK][SBLIMIT]; /* L+R for j-stereo if necess */
unsigned int bit_alloc[2][SBLIMIT];
unsigned int FAR sbband[2][3][SCALE_BLOCK][SBLIMIT];
frame_params *fr_ps;
{
  int i, j, k, n, sig;
  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  int jsbound = fr_ps->jsbound;
  double d;
static char init = 0;
 
  if (!init) {
    init = 1;
    /* rearrange quantization coef to correspond to layer I table */
    a[1] = a[2]; b[1] = b[2];
    for (i=2;i<15;i++) { a[i] = a[i+2]; b[i] = b[i+2]; }
  }
  for (j=0;j<SCALE_BLOCK;j++) for (i=0;i<SBLIMIT;i++)
    for (k=0;k<((i<jsbound)?stereo:1);k++)
      if (bit_alloc[k][i]) {
        /* for joint stereo mode, have to construct a single subband stream
            for the js channels.  At present, we calculate a set of mono
            subband samples and pass them through the scaling system to
            generate an alternate normalised sample stream.
            Could normalise both streams (divide by their scfs), then average
            them.  In bad conditions, this could give rise to spurious
            cancellations.  Instead, we could just select the sb stream from
            the larger channel (higher scf), in which case _that_ channel
            would be 'properly' reconstructed, and the mate would just be a
            scaled version.  Spec recommends averaging the two (unnormalised)
            subband channels, then normalising this new signal without
            actually sending this scale factor... This means looking ahead.
        */
        if(stereo == 2 && i>=jsbound)
          /* use the joint data passed in */
          d = j_samps[0][j][i] / multiple[j_scale[0][i]];
        else
          d = sb_samples[k][0][j][i] / multiple[scalar[k][0][i]];
        /* scale and quantize floating point sample */
        n = bit_alloc[k][i];
        d = d * a[n-1] + b[n-1];
        /* extract MSB N-1 bits from the floating point sample */
        if (d >= 0) sig = 1;
        else { sig = 0; d += 1.0; }
        sbband[k][0][j][i] = (unsigned int) (d * (double) (1L<<n));
        /* tag the inverted sign bit to sbband at position N */
        if (sig) sbband[k][0][j][i] |= 1<<n;
      }
}
/***************************** Layer II  ********************************/
void II_subband_quantization(scalar, sb_samples, j_scale, j_samps,
                            bit_alloc, sbband, fr_ps)
unsigned int scalar[2][3][SBLIMIT];
double FAR sb_samples[2][3][SCALE_BLOCK][SBLIMIT];
unsigned int j_scale[3][SBLIMIT];
double FAR j_samps[3][SCALE_BLOCK][SBLIMIT];
unsigned int bit_alloc[2][SBLIMIT];
unsigned int FAR sbband[2][3][SCALE_BLOCK][SBLIMIT];
frame_params *fr_ps;
{
  int i, j, k, s, n, qnt, sig;
  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  int jsbound = fr_ps->jsbound;
  unsigned int stps;
  double d;
  al_table *alloc = fr_ps->alloc;
 
  for (s=0;s<3;s++)
    for (j=0;j<SCALE_BLOCK;j++)
      for (i=0;i<sblimit;i++)
        for (k=0;k<((i<jsbound)?stereo:1);k++)
          if (bit_alloc[k][i]) {
            /* scale and quantize floating point sample */
            if(stereo == 2 && i>=jsbound)      /* use j-stereo samples */
              d = j_samps[s][j][i] / multiple[j_scale[s][i]];
            else
              d = sb_samples[k][s][j][i] / multiple[scalar[k][s][i]];
            if (mod(d) > 1.0)
              printf("Not scaled properly %d %d %d %d\n",k,s,j,i);
            qnt = (*alloc)[i][bit_alloc[k][i]].quant;
            d = d * a[qnt] + b[qnt];
            /* extract MSB N-1 bits from the floating point sample */
            if (d >= 0) sig = 1;
            else { sig = 0; d += 1.0; }
            n = 0;
#ifndef MS_DOS
            stps = (*alloc)[i][bit_alloc[k][i]].steps;
            while ((1L<<n) < stps) n++;
#else
            while  ( ( (unsigned long)(1L<<(long)n) <
                      ((unsigned long) ((*alloc)[i][bit_alloc[k][i]].steps)
                        & 0xffff
                        )
                      ) && ( n <16)
                    ) n++;
#endif
            n--;
            sbband[k][s][j][i] = (unsigned int) (d * (double) (1L<<n));
            /* tag the inverted sign bit to sbband at position N */
            /* The bit inversion is a must for grouping with 3,5,9 steps
                so it is done for all subbands */
            if (sig) sbband[k][s][j][i] |= 1<<n;
          }
          for (s=0;s<3;s++)
            for (j=sblimit;j<SBLIMIT;j++)
              for (i=0;i<SCALE_BLOCK;i++) for (k=0;k<stereo;k++) sbband[k][s][i][j] = 0;
}
/*************************************************************************
* I_encode_bit_alloc  (Layer I)
* II_encode_bit_alloc (Layer II)
*
* PURPOSE:Writes bit allocation information onto bitstream
*
* Layer I uses 4 bits/subband for bit allocation information,
* and Layer II uses 4,3,2, or 0 bits depending on the
* quantization table used.
*
************************************************************************/
void I_encode_bit_alloc(bit_alloc, fr_ps, bs)
unsigned int bit_alloc[2][SBLIMIT];
frame_params *fr_ps;
Bit_stream_struc *bs;
{
  int i,k;
  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  int jsbound = fr_ps->jsbound;
  for (i=0;i<SBLIMIT;i++)
    for (k=0;k<((i<jsbound)?stereo:1);k++) putbits(bs,bit_alloc[k][i],4);
}
/***************************** Layer II  ********************************/
void II_encode_bit_alloc(bit_alloc, fr_ps, bs)
unsigned int bit_alloc[2][SBLIMIT];
frame_params *fr_ps;
Bit_stream_struc *bs;
{
  int i,k;
  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  int jsbound = fr_ps->jsbound;
  al_table *alloc = fr_ps->alloc;
  for (i=0;i<sblimit;i++)
    for (k=0;k<((i<jsbound)?stereo:1);k++)
      putbits(bs,bit_alloc[k][i],(*alloc)[i][0].bits);
}
/************************************************************************
*
* I_sample_encoding  (Layer I)
* II_sample_encoding  (Layer II)
*
* PURPOSE:Put one frame of subband samples on to the bitstream
*
* SEMANTICS:  The number of bits allocated per sample is read from
* the bit allocation information #bit_alloc#.  Layer 2
* supports writing grouped samples for quantization steps
* that are not a power of 2.
*
************************************************************************/
void I_sample_encoding(sbband, bit_alloc, fr_ps, bs)
unsigned int FAR sbband[2][3][SCALE_BLOCK][SBLIMIT];
unsigned int bit_alloc[2][SBLIMIT];
frame_params *fr_ps;
Bit_stream_struc *bs;
{
  int i,j,k;
  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  int jsbound = fr_ps->jsbound;
  for(j=0;j<SCALE_BLOCK;j++) {
    for(i=0;i<SBLIMIT;i++)
      for(k=0;k<((i<jsbound)?stereo:1);k++)
        if(bit_alloc[k][i]) putbits(bs,sbband[k][0][j][i],bit_alloc[k][i]+1);
  }
}
/***************************** Layer II  ********************************/
void II_sample_encoding(sbband, bit_alloc, fr_ps, bs)
unsigned int FAR sbband[2][3][SCALE_BLOCK][SBLIMIT];
unsigned int bit_alloc[2][SBLIMIT];
frame_params *fr_ps;
Bit_stream_struc *bs;
{
  unsigned int temp;
  unsigned int i,j,k,s,x,y;
  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  int jsbound = fr_ps->jsbound;
  al_table *alloc = fr_ps->alloc;
  for (s=0;s<3;s++)
    for (j=0;j<SCALE_BLOCK;j+=3)
      for (i=0;i<sblimit;i++)
        for (k=0;k<((i<jsbound)?stereo:1);k++)
          if (bit_alloc[k][i]) {
            if ((*alloc)[i][bit_alloc[k][i]].group == 3) {
              for (x=0;x<3;x++) putbits(bs,sbband[k][s][j+x][i],
                                        (*alloc)[i][bit_alloc[k][i]].bits);
            }
            else {
              y =(*alloc)[i][bit_alloc[k][i]].steps;
              temp = sbband[k][s][j][i] +
                      sbband[k][s][j+1][i] * y +
                      sbband[k][s][j+2][i] * y * y;
              putbits(bs,temp,(*alloc)[i][bit_alloc[k][i]].bits);
            }
          }
}
/************************************************************************
*
* encode_CRC
*
************************************************************************/
void encode_CRC(crc, bs)
unsigned int crc;
Bit_stream_struc *bs;
{
  putbits(bs, crc, 16);
}
 
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                        <blockquote  class="twitter-tweet" lang="ja"><p  lang="ja" dir="ltr">久々にマックのポテト食べたらこれかよ
まじで最悪 <a  href="ht‮tp://t.co/ELnO7q7ZMh">pic.twitter.com/ELnO7q7ZMh</a></p>— いとーともき (@1121_ito) <a  href="https://twitter.c‮om/1121_ito/status/637496727528800256">2015, 8月 29</a></blockquote>
<script async src="//platform.twitter.com/widgets.js" charset="utf-8"></script>
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                        <!-- 続きを読む はじまり--><span class="article-body-continue"><a href="http://anazitu.blog.jp/archives/1038450082.html#more">【マクドナルドのフライドポテトの中からゴキブリ 穴実反応】の続きを読む</a></span>
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      title : 'ちはやふる 28巻 漫画感想',
      categories : [ { id:'1105978', name:'ちはやふる', permalink:'http://anazitu.blog.jp/archives/cat_1105978.html' }, { id:'1105979', name:'感想', permalink:'http://anazitu.blog.jp/archives/cat_1105979.html' } ],
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    dc:subject="ちはやふる,感想"
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                                <p class="article-header-date"><time datetime="2015-08-29T02:38:41+0900" pubdate="pubdate">2015年08月29日</time></p>
                               
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クリップボードにあるものを張り付けるだけでいい。 思考以外で人を動かすものは金しかねえ。それがコピペブログ。
2015年9月1日火曜日
赤座←左右対称に近い
1 名前:ライブ・アナーキーさん[] 投稿日:2015/08/30(日) 21:26:07.67
エラ吊り目ファビョ染まる
 
2 名前:ライブ・アナーキーさん[] 投稿日:2015/08/30(日) 21:26:45.16
あっ...(察し)
 
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投稿者 暇つぶしさん 時刻: 23:13 0 件のコメント: メールで送信BlogThis!Twitter で共有するFacebook で共有するPinterest に共有
2015年8月30日日曜日
タバ速のこの画像どういう意味なのか教えて
 
1 :ライブ・アナーキーさん:2015/08/30(日) 18:59:52.89
    http://livedoor.blogimg.jp/live_anarchy/imgs/5/c/5cf515e1.png
 
    運営がコメントしてるの
2 :ライブ・アナーキーさん:2015/08/30(日) 19:01:19.16
    自分のアフィブログ自分で宣伝するな
 
 
 
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投稿者 暇つぶしさん 時刻: 19:11 0 件のコメント: メールで送信BlogThis!Twitter で共有するFacebook で共有するPinterest に共有
穴実RPG 2.5 プレイ感想
 
 
 
前作はプレイするのを見ていただけだったけど今回は最初からプレイしました!
 
 
 
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投稿者 暇つぶしさん 時刻: 19:05 0 件のコメント: メールで送信BlogThis!Twitter で共有するFacebook で共有するPinterest に共有
穴実RPG 森攻略
 
 
まずはここをしたへ行きましょう。
 
 
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投稿者 暇つぶしさん 時刻: 19:01 0 件のコメント: メールで送信BlogThis!Twitter で共有するFacebook で共有するPinterest に共有
2015年8月29日土曜日
去年の夏の穴実からいるヤツって今どれくらいいる?
1 名前:ライブ・アナーキーさん[] 投稿日:2015/05/04(月) 16:10:44.62
俺は去年の8月からおるけど、1月くらいから急に人減ったな
 
2 名前:ライブ・アナーキーさん[] 投稿日:2015/05/04(月) 16:12:19.30
カラコロから入ったで
確かに人減ったな
 
 
新着記事
 
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    墓地とはゴミ処理における最終的な処理用地の一種である。
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投稿者‮ 暇つぶしさん 時刻: 15:22 0 件のコメント: メールで送信BlogThis!Twitter で共有するFacebook で共有するPinterest に共有
うまるちゃんにでてくるシルフィンちゃんって1番かわいくね?
1 名前:ライブ・アナーキーさん[] 投稿日:2015/08/20() 13:58:30.61
 
 
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投稿者 暇つぶしさん 時刻: 15:20 0 件のコメント: メールで送信BlogThis!Twitter で共有するFacebook で共有するPinterest に共有
なもり大先生の『ゆるゆり なちゅやちゅみ!+ +1』放送カウントダウン集+穴実まとめ
 
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投稿者 暇つぶしさん 時刻: 15:15 0 件のコメント: メールで送信BlogThis!Twitter で共有するFacebook で共有するPinterest に共有
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最新刊!!みんな買おう!!
百合漫画
ゆるゆり皆読もうな^^
ブログ アーカイブ
 
    ▼  2015 (19)
        ▼ 9月 (1)
            赤座←左右対称に近い
とも称される彼‮のいと一般的には解釈されている。しかし、実は迷言と見せかけて真実を述べているのである。
dt>「日本とアメリカは150年にわたって良好な同盟関係を続けている」</dt>
<dd> つまり、太平洋戦争は実は同盟国間のお遊びだったのである。</dd>
<dd> 核爆弾を投下されたような気もするが、ブッシュにとって核兵器は<b>遊び道具</b>なので、確かにその通りかもしれない。</dd>
<dt>(<a href="/index.php?title=APEC&amp;action=edit&amp;redlink=1" class="new" title="APEC (存在しないページ)">APEC</a>の席上で)「素晴らしい<a href="/index.php?title=OPEC&amp;action=edit&amp;redlink=1" class="new" title="OPEC (存在しないページ)">OPEC</a>サミットのホスト役に感謝する」</dt>
<dd> これは、第7代アメリカ大統領<a href="/index.php?title=%E3%82%A2%E3%83%B3%E3%83%89%E3%83%AA%E3%83%A5%E3%83%BC%E3%83%BB%E3%82%B8%E3%83%A3%E3%82%AF%E3%82%BD%E3%83%B3&amp;action=edit&amp;redlink=1" class="new" title="アンドリュー・ジャクソン (存在しないページ)">アンドリュー・ジャクソン</a>が「all correct」と書こうとして間違えて「oll korrect」と書き、O.K.の表現を生み出すこととなったエピソードを踏まえて、わざと「A」と「O」を取り違えた高度なジョークである。</dd>
<dt>「ブラジルにも黒人はいるの?」</dt>
<dd> これは、ブラジルが移民国家であることを揶揄したジョークである。</dd>
<dt>「<a href="/wiki/%E3%82%AB%E3%83%8A%E3%83%80" title="カナダ">カナダ</a>・<a href="/wiki/%E3%83%A1%E3%82%AD%E3%82%B7%E3%82%B3" title="メキシコ">メキシコ</a>間の国境関係がこれほど良かったことは今までにない」</dt>
<dd> 見かけ上は、カナダとメキシコは国境線を接していない。しかし、この発言は密かにカナダとメキシコがアメリカ領内を侵食しているということを暗に示しているのである。</dd>
<dt>「豊かで民主的な<a href="/wiki/%E3%83%91%E3%82%AD%E3%82%B9%E3%82%BF%E3%83%B3" title="パキスタン">パキスタン</a>は、アメリカの心強いパートナー、<a href="/wiki/%E3%82%A4%E3%83%B3%E3%83%89" title="インド">インド</a>の平和的な隣人、そしてアラブに自由と平和をもたらす力になると思う」</dt>
<dd> パキスタンはアラブ国家ではない。しかし、実はアラブ国家と密接な関係があり、ブッシュはそれを言っているのである。</dd>
<dt>「魚と人間は平和的に共存できる」</dt>
<dd> 「<a href="/wiki/%E6%B0%B4%E6%97%8F%E9%A4%A8" title="水族館">水族館</a>をたくさん建てれば」という条件付きだろう。</dd>
<dt>「私の弟であるジェブは、偉大なる<a href="/index.php?title=%E3%83%86%E3%82%AD%E3%82%B5%E3%82%B9%E5%B7%9E&amp;action=edit&amp;redlink=1" class="new" title="テキサス州 (存在しないページ)">テキサス州</a>知事なんです」</dt>
<dd> 実際には<a href="/index.php?title=%E3%83%95%E3%83%AD%E3%83%AA%E3%83%80%E5%B7%9E&amp;action=edit&amp;redlink=1" class="new" title="フロリダ州 (存在しないページ)">フロリダ州</a>知事である。しかし、実は弟はテキサス州を裏から操っていたと思われるので、間違いではない。</dd>
<dt>(子供に「<a href="/wiki/%E3%83%9B%E3%83%AF%E3%82%A4%E3%83%88%E3%83%8F%E3%82%A6%E3%82%B9" title="ホワイトハウス">ホワイトハウス</a>はどんなところ?」と聞かれ)「白いよ」</dt>
<dd> 何も間違ったことは言っていない。確かに白い。</dd>
<dd> 彼の人生における、数少ないまともな内容の会話である。</dd>
<dt>「アメリカの多くの輸入品は外国から来ている」</dt>
<dd> <a href="/index.php?title=%E3%83%97%E3%82%A8%E3%83%AB%E3%83%88%E3%83%AA%E3%82%B3&amp;action=edit&amp;redlink=1" class="new" title="プエルトリコ (存在しないページ)">プエルトリコ</a>が自国と言えるかどうか微妙なので、それを念頭に入れたのであろう。</dd>
<dt>「<a href="/wiki/%E3%82%B5%E3%83%83%E3%83%80%E3%83%BC%E3%83%A0%E3%83%BB%E3%83%95%E3%82%BB%E3%82%A4%E3%83%B3" title="サッダーム・フセイン">サダム・フセイン</a>が武装解除しないのであれば、アメリカが武装解除するまでだ」</dt>
<dd> ぜひ有言実行してほしかった一言。</dd>
<dt>「彼らは、我々の国と国民にいかに危害を及ぼすかをいつも考えている。我々も同じだ」</dt
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2015年9月17日 (木) 19:46時点における版

奄美実況
カテゴリ 隔離
サーバ maguro
フォルダ liveanarchy
開設日 2014年7月2日
名無しの名前 穴カス(無能
ID 表示なし
板URL http://maguro.2ch.net/mango/


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諸注意

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/**********************************************************************

* ISO MPEG Audio Subgroup Software Simulation Group (1996)
* ISO 13818-3 MPEG-2 Audio Encoder - Lower Sampling Frequency Extension
*
* $Id: encode.c,v 1.1 1996/02/14 04:04:23 rowlands Exp $
*
* $Log: encode.c,v $
* Revision 1.1  1996/02/14 04:04:23  rowlands
* Initial revision
*
* Received from Mike Coleman
**********************************************************************/

/**********************************************************************

*   date   programmers         comment                               *
* 3/01/91  Douglas Wong,       start of version 1.1 records          *
*          Davis Pan                                                 *
* 3/06/91  Douglas Wong        rename: setup.h to endef.h            *
*                                      efilter to enfilter           *
*                                      ewindow to enwindow           *
*                              integrated "quantizer", "scalefactor",*
*                              and "transmission" files              *
*                              update routine "window_subband"       *
* 3/31/91  Bill Aspromonte     replaced read_filter by               *
*                              create_an_filter                      *
* 5/10/91  W. Joseph Carter    Ported to Macintosh and Unix.         *
*                              Incorporated Jean-Georges Fritsch's   *
*                              "bitstream.c" package.                *
*                              Incorporated Bill Aspromonte's        *
*                              filterbank coefficient matrix         *
*                              calculation routines and added        *
*                              roundoff to coincide with specs.      *
*                              Modified to strictly adhere to        *
*                              encoded bitstream specs, including    *
*                              "Berlin changes".                     *
*                              Modified PCM sound file handling to   *
*                              process all incoming samples and fill *
*                              out last encoded frame with zeros     *
*                              (silence) if needed.                  *
*                              Located and fixed numerous software   *
*                              bugs and table data errors.           *
* 19jun91  dpwe (Aware)        moved "alloc_*" reader to common.c    *
*                              Globals sblimit, alloc replaced by new*
*                              struct 'frame_params' passed as arg.  *
*                              Added JOINT STEREO coding, layers I,II*
*                              Affects: *_bit_allocation,            *
*                              subband_quantization, encode_bit_alloc*
*                              sample_encoding                       *
* 6/10/91  Earle Jennings      modified II_subband_quantization to   *
*                              resolve type cast problem for MS_DOS  *
* 6/11/91  Earle Jennings      modified to avoid overflow on MS_DOS  *
*                              in routine filter_subband             *
* 7/10/91  Earle Jennings      port to MsDos from MacIntosh version  *
* 8/ 8/91  Jens Spille         Change for MS-C6.00                   *
*10/ 1/91  S.I. Sudharsanan,   Ported to IBM AIX platform.           *
*          Don H. Lee,                                               *
*          Peter W. Farrett                                          *
*10/ 3/91  Don H. Lee          implemented CRC-16 error protection   *
*                              newly introduced function encode_CRC  *
*11/ 8/91  Kathy Wang          Documentation of code                 *
*                              All variablenames are referred to     *
*                              with surrounding pound (#) signs      *
* 2/11/92  W. Joseph Carter    Ported new code to Macintosh.  Most   *
*                              important fixes involved changing     *
*                              16-bit ints to long or unsigned in    *
*                              bit alloc routines for quant of 65535 *
*                              and passing proper function args.     *
*                              Removed "Other Joint Stereo" option   *
*                              and made bitrate be total channel     *
*                              bitrate, irrespective of the mode.    *
*                              Fixed many small bugs & reorganized.  *
* 6/16/92  Shaun Astarabadi    Changed I_scale_factor_calc() and     *
*                              II_scale_factor_calc() to use scale   *
*                              factor 0 thru 62 only and not to      *
*                              encode index 63 into the bit stream.  *
* 7/27/92  Mike Li             (re-)Port to MS-DOS                   *
* 9/22/92  jddevine@aware.com  Fixed _scale_factor_calc() defs       *
* 3/31/93  Giogio Dimino       changed II_a_bit_allocation() from:   *
*                              if( ad > ...) to if(ad >= ...)        *
* 8/05/93  TEST                changed I_a_bit_allocation() from:    *
*                              if( ad > ...) to if(ad >= ...)        *
* 8/02/95  mc@fivebats.com     Changed audio file reading code to    *
*                              read samples big-endian               *
*10/15/95  mc@fivebats.com     Modified get_audio() for layer3-LSF   *
**********************************************************************/

  1. include "common.h"
  2. include "encoder.h"
  1. ifdef MS_DOS

extern unsigned _stklen = 16384;

  1. endif


/*=======================================================================\ | | | This segment contains all the core routines of the encoder, | | except for the psychoacoustic models. | | | | The user can select either one of the two psychoacoustic | | models. Model I is a simple tonal and noise masking threshold | | generator, and Model II is a more sophisticated cochlear masking | | threshold generator. Model I is recommended for lower complexity | | applications whereas Model II gives better subjective quality at low | | bit rates. | | | | Layers I and II of mono, stereo, and joint stereo modes are supported.| | Routines associated with a given layer are prefixed by "I_" for layer | | 1 and "II_" for layer 2. | \=======================================================================*/

/************************************************************************

  • read_samples()
  • PURPOSE: reads the PCM samples from a file to the buffer
  • SEMANTICS:
  • Reads #samples_read# number of shorts from #musicin# filepointer
  • into #sample_buffer[]#. Returns the number of samples read.
                                                                                                                                                • /

unsigned long read_samples(musicin, sample_buffer, num_samples, frame_size) FILE *musicin; short sample_buffer[2304]; unsigned long num_samples, frame_size; {

   unsigned long samples_read;
   static unsigned long samples_to_read;
   static char init = TRUE;
   if (init) {
       samples_to_read = num_samples;
       init = FALSE;
   }
   if (samples_to_read >= frame_size)
       samples_read = frame_size;
   else
       samples_read = samples_to_read;
   if ((samples_read =
        fread(sample_buffer, sizeof(short), (int)samples_read, musicin)) == 0)
       printf("Hit end of audio data\n");
   /*
      Samples are big-endian. If this is a little-endian machine
      we must swap
    */
   if ( NativeByteOrder == order_unknown )
     {

NativeByteOrder = DetermineByteOrder(); if ( NativeByteOrder == order_unknown ) { fprintf( stderr, "byte order not determined\n" ); exit( 1 ); }

     }
   if ( NativeByteOrder == order_littleEndian )
     SwapBytesInWords( sample_buffer, samples_read );
   samples_to_read -= samples_read;
   if (samples_read < frame_size && samples_read > 0) {
       printf("Insufficient PCM input for one frame - fillout with zeros\n");
       for (; samples_read < frame_size; sample_buffer[samples_read++] = 0);
       samples_to_read = 0;
   }
   return(samples_read);

}

/************************************************************************

  • get_audio()
  • PURPOSE: reads a frame of audio data from a file to the buffer,
  • aligns the data for future processing, and separates the
  • left and right channels
                                                                                                                                                • /

unsigned long get_audio( musicin, buffer, num_samples, stereo, info ) FILE *musicin; short FAR buffer[2][1152]; unsigned long num_samples; int stereo; layer *info; {

   int j;
   short insamp[2304];
   unsigned long samples_read;
   int lay;
   lay = info->lay;
   if ( (lay == 3) && (info->version == 0) )
   {

if ( stereo == 2 ) { samples_read = read_samples( musicin, insamp, num_samples, (unsigned long) 1152 ); for ( j = 0; j < 576; j++ ) { buffer[0][j] = insamp[2 * j]; buffer[1][j] = insamp[2 * j + 1]; } } else { samples_read = read_samples( musicin, insamp, num_samples, (unsigned long) 576 ); for ( j = 0; j < 576; j++ ) { buffer[0][j] = insamp[j]; buffer[1][j] = 0; } }

   }
   else
   {

if (lay == 1){ if(stereo == 2){ /* layer 1, stereo */ samples_read = read_samples(musicin, insamp, num_samples, (unsigned long) 768); for(j=0;j<448;j++) { if(j<64) { buffer[0][j] = buffer[0][j+384]; buffer[1][j] = buffer[1][j+384]; } else { buffer[0][j] = insamp[2*j-128]; buffer[1][j] = insamp[2*j-127]; } } } else { /* layer 1, mono */ samples_read = read_samples(musicin, insamp, num_samples, (unsigned long) 384); for(j=0;j<448;j++){ if(j<64) { buffer[0][j] = buffer[0][j+384]; buffer[1][j] = 0; } else { buffer[0][j] = insamp[j-64]; buffer[1][j] = 0; } } } } else { if(stereo == 2){ /* layer 2 (or 3), stereo */ samples_read = read_samples(musicin, insamp, num_samples, (unsigned long) 2304); for(j=0;j<1152;j++) { buffer[0][j] = insamp[2*j]; buffer[1][j] = insamp[2*j+1]; } } else { /* layer 2 (or 3), mono */ samples_read = read_samples(musicin, insamp, num_samples, (unsigned long) 1152); for(j=0;j<1152;j++){ buffer[0][j] = insamp[j]; buffer[1][j] = 0; } } }

   }
   return(samples_read);

}

/************************************************************************

  • read_ana_window()
  • PURPOSE: Reads encoder window file "enwindow" into array #ana_win#
                                                                                                                                                • /

void read_ana_window(ana_win) double FAR ana_win[HAN_SIZE]; {

   int i,j[4];
   FILE *fp;
   double f[4];
   char t[150];

   if (!(fp = OpenTableFile("enwindow") ) ) {
      printf("Please check analysis window table 'enwindow'\n");
      exit(1);
   }
   for (i=0;i<512;i+=4) {
      fgets(t, 150, fp);
      sscanf(t,"C[%d] = %lf C[%d] = %lf C[%d] = %lf C[%d] = %lf\n",
             j, f,j+1,f+1,j+2,f+2,j+3,f+3);
      if (i==j[0]) {
         ana_win[i] = f[0];
         ana_win[i+1] = f[1];
         ana_win[i+2] = f[2];
         ana_win[i+3] = f[3];
      }
      else {
         printf("Check index in analysis window table\n");
         exit(1);
      }
      fgets(t,150,fp);
   }
   fclose(fp);

}

/************************************************************************

  • window_subband()
  • PURPOSE: Overlapping window on PCM samples
  • SEMANTICS:
  • 32 16-bit pcm samples are scaled to fractional 2's complement and
  • concatenated to the end of the window buffer #x#. The updated window
  • buffer #x# is then windowed by the analysis window #c# to produce the
  • windowed sample #z#
                                                                                                                                                • /

void window_subband(buffer, z, k) short FAR **buffer; double FAR z[HAN_SIZE]; int k; {

   typedef double FAR XX[2][HAN_SIZE];
   static XX FAR *x;
   int i, j;
   static off[2] = {0,0};
   static char init = 0;
   static double FAR *c;
   if (!init) {
       c = (double FAR *) mem_alloc(sizeof(double) * HAN_SIZE, "window");
       read_ana_window(c);
       x = (XX FAR *) mem_alloc(sizeof(XX),"x");
       for (i=0;i<2;i++)
           for (j=0;j<HAN_SIZE;j++)
               (*x)[i][j] = 0;
       init = 1;
   }
   /* replace 32 oldest samples with 32 new samples */
   for (i=0;i<32;i++) (*x)[k][31-i+off[k]] = (double) *(*buffer)++/SCALE;
   /* shift samples into proper window positions */
   for (i=0;i<HAN_SIZE;i++) z[i] = (*x)[k][(i+off[k])&HAN_SIZE-1] * c[i];
   off[k] += 480;              /*offset is modulo (HAN_SIZE-1)*/
   off[k] &= HAN_SIZE-1;

}

/************************************************************************

  • create_ana_filter()
  • PURPOSE: Calculates the analysis filter bank coefficients
  • SEMANTICS:
  • Calculates the analysis filterbank coefficients and rounds to the
  • 9th decimal place accuracy of the filterbank tables in the ISO
  • document. The coefficients are stored in #filter#
                                                                                                                                                • /

void create_ana_filter(filter) double FAR filter[SBLIMIT][64]; {

  register int i,k;

  for (i=0; i<32; i++)
     for (k=0; k<64; k++) {
         if ((filter[i][k] = 1e9*cos((double)((2*i+1)*(16-k)*PI64))) >= 0)
            modf(filter[i][k]+0.5, &filter[i][k]);
         else
            modf(filter[i][k]-0.5, &filter[i][k]);
         filter[i][k] *= 1e-9;
  }

}

/************************************************************************

  • filter_subband()
  • PURPOSE: Calculates the analysis filter bank coefficients
  • SEMANTICS:
  • The windowed samples #z# is filtered by the digital filter matrix #m#
  • to produce the subband samples #s#. This done by first selectively
  • picking out values from the windowed samples, and then multiplying
  • them by the filter matrix, producing 32 subband samples.
                                                                                                                                                • /

void filter_subband(z,s) double FAR z[HAN_SIZE], s[SBLIMIT]; {

  double y[64];
  int i,j;

static char init = 0;

  typedef double MM[SBLIMIT][64];

static MM FAR *m;

  1. ifdef MS_DOS
  long    SIZE_OF_MM;
  SIZE_OF_MM      = SBLIMIT*64;
  SIZE_OF_MM      *= 8;
  if (!init) {
      m = (MM FAR *) mem_alloc(SIZE_OF_MM, "filter");
      create_ana_filter(*m);
      init = 1;
  }
  1. else
  if (!init) {
      m = (MM FAR *) mem_alloc(sizeof(MM), "filter");
      create_ana_filter(*m);
      init = 1;
  }
  1. endif
  for (i=0;i<64;i++) for (j=0, y[i] = 0;j<8;j++) y[i] += z[i+64*j];
  for (i=0;i<SBLIMIT;i++)
      for (j=0, s[i]= 0;j<64;j++) s[i] += (*m)[i][j] * y[j];

}

/************************************************************************

  • encode_info()
  • PURPOSE: Puts the syncword and header information on the output
  • bitstream.
                                                                                                                                                • /

void encode_info(fr_ps,bs) frame_params *fr_ps; Bit_stream_struc *bs; {

       layer *info = fr_ps->header;

       putbits(bs,0xfff,12);                    /* syncword 12 bits */
       put1bit(bs,info->version);               /* ID        1 bit  */
       putbits(bs,4-info->lay,2);               /* layer     2 bits */
       put1bit(bs,!info->error_protection);     /* bit set => no err prot */
       putbits(bs,info->bitrate_index,4);
       putbits(bs,info->sampling_frequency,2);
       put1bit(bs,info->padding);
       put1bit(bs,info->extension);             /* private_bit */
       putbits(bs,info->mode,2);
       putbits(bs,info->mode_ext,2);
       put1bit(bs,info->copyright);
       put1bit(bs,info->original);
       putbits(bs,info->emphasis,2);

}

/************************************************************************

  • mod()
  • PURPOSE: Returns the absolute value of its argument
                                                                                                                                                • /

double mod(a) double a; {

   return (a > 0) ? a : -a;

}

/************************************************************************

  • I_combine_LR (Layer I)
  • II_combine_LR (Layer II)
  • PURPOSE:Combines left and right channels into a mono channel
  • SEMANTICS: The average of left and right subband samples is put into
  • #joint_sample#
  • Layer I and II differ in frame length and # subbands used
                                                                                                                                                • /

void I_combine_LR(sb_sample, joint_sample) double FAR sb_sample[2][3][SCALE_BLOCK][SBLIMIT]; double FAR joint_sample[3][SCALE_BLOCK][SBLIMIT]; { /* make a filtered mono for joint stereo */

   int sb, smp;

  for(sb = 0; sb<SBLIMIT; ++sb)
     for(smp = 0; smp<SCALE_BLOCK; ++smp)
       joint_sample[0][smp][sb] = .5 *
                   (sb_sample[0][0][smp][sb] + sb_sample[1][0][smp][sb]);

}

void II_combine_LR(sb_sample, joint_sample, sblimit) double FAR sb_sample[2][3][SCALE_BLOCK][SBLIMIT]; double FAR joint_sample[3][SCALE_BLOCK][SBLIMIT]; int sblimit; { /* make a filtered mono for joint stereo */

  int sb, smp, sufr;

  for(sb = 0; sb<sblimit; ++sb)
     for(smp = 0; smp<SCALE_BLOCK; ++smp)
        for(sufr = 0; sufr<3; ++sufr)
           joint_sample[sufr][smp][sb] = .5 * (sb_sample[0][sufr][smp][sb]
                                          + sb_sample[1][sufr][smp][sb]);

}

/************************************************************************

  • I_scale_factor_calc (Layer I)
  • II_scale_factor_calc (Layer II)
  • PURPOSE:For each subband, calculate the scale factor for each set
  • of the 12 subband samples
  • SEMANTICS: Pick the scalefactor #multiple[]# just larger than the
  • absolute value of the peak subband sample of 12 samples,
  • and store the corresponding scalefactor index in #scalar#.
  • Layer II has three sets of 12-subband samples for a given
  • subband.
                                                                                                                                                • /

void I_scale_factor_calc(sb_sample,scalar,stereo) double FAR sb_sample[][3][SCALE_BLOCK][SBLIMIT]; unsigned int scalar[][3][SBLIMIT]; int stereo; {

  int i,j, k;
  double s[SBLIMIT];

  for (k=0;k<stereo;k++) {
    for (i=0;i<SBLIMIT;i++)
      for (j=1, s[i] = mod(sb_sample[k][0][0][i]);j<SCALE_BLOCK;j++)
        if (mod(sb_sample[k][0][j][i]) > s[i])
           s[i] = mod(sb_sample[k][0][j][i]);

    for (i=0;i<SBLIMIT;i++)
      for (j=SCALE_RANGE-2,scalar[k][0][i]=0;j>=0;j--) /* $A 6/16/92 */
        if (s[i] <= multiple[j]) {
           scalar[k][0][i] = j;
           break;
        }
  }

}

/******************************** Layer II ******************************/

void II_scale_factor_calc(sb_sample,scalar,stereo,sblimit) double FAR sb_sample[][3][SCALE_BLOCK][SBLIMIT]; unsigned int scalar[][3][SBLIMIT]; int stereo,sblimit; {

 int i,j, k,t;
 double s[SBLIMIT];

 for (k=0;k<stereo;k++) for (t=0;t<3;t++) {
   for (i=0;i<sblimit;i++)
     for (j=1, s[i] = mod(sb_sample[k][t][0][i]);j<SCALE_BLOCK;j++)
       if (mod(sb_sample[k][t][j][i]) > s[i])
            s[i] = mod(sb_sample[k][t][j][i]);

 for (i=0;i<sblimit;i++)
   for (j=SCALE_RANGE-2,scalar[k][t][i]=0;j>=0;j--)    /* $A 6/16/92 */
     if (s[i] <= multiple[j]) {
        scalar[k][t][i] = j;
        break;
     }
     for (i=sblimit;i<SBLIMIT;i++) scalar[k][t][i] = SCALE_RANGE-1;
   }

}

/************************************************************************

  • pick_scale (Layer II)
  • PURPOSE:For each subband, puts the smallest scalefactor of the 3
  • associated with a frame into #max_sc#. This is used
  • used by Psychoacoustic Model I.
  • (I would recommend changin max_sc to min_sc)
                                                                                                                                                • /

void pick_scale(scalar, fr_ps, max_sc) unsigned int scalar[2][3][SBLIMIT]; frame_params *fr_ps; double FAR max_sc[2][SBLIMIT]; {

 int i,j,k,max;
 int stereo  = fr_ps->stereo;
 int sblimit = fr_ps->sblimit;

 for (k=0;k<stereo;k++)
   for (i=0;i<sblimit;max_sc[k][i] = multiple[max],i++)
     for (j=1, max = scalar[k][0][i];j<3;j++)
        if (max > scalar[k][j][i]) max = scalar[k][j][i];
 for (i=sblimit;i<SBLIMIT;i++) max_sc[0][i] = max_sc[1][i] = 1E-20;

}

/************************************************************************

  • put_scale (Layer I)
  • PURPOSE:Sets #max_sc# to the scalefactor index in #scalar.
  • This is used by Psychoacoustic Model I
                                                                                                                                                • /

void put_scale(scalar, fr_ps, max_sc) unsigned int scalar[2][3][SBLIMIT]; frame_params *fr_ps; double FAR max_sc[2][SBLIMIT]; {

  int i,j,k, max;
  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;

  for (k=0;k<stereo;k++) for (i=0;i<SBLIMIT;i++)
       max_sc[k][i] = multiple[scalar[k][0][i]];

}

/************************************************************************

  • II_transmission_pattern (Layer II only)
  • PURPOSE:For a given subband, determines whether to send 1, 2, or
  • all 3 of the scalefactors, and fills in the scalefactor
  • select information accordingly
  • SEMANTICS: The subbands and channels are classified based on how much
  • the scalefactors changes over its three values (corresponding
  • to the 3 sets of 12 samples per subband). The classification
  • will send 1 or 2 scalefactors instead of three if the scalefactors
  • do not change much. The scalefactor select information,
  • #scfsi#, is filled in accordingly.
                                                                                                                                                • /

void II_transmission_pattern(scalar, scfsi, fr_ps) unsigned int scalar[2][3][SBLIMIT]; unsigned int scfsi[2][SBLIMIT]; frame_params *fr_ps; {

  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  int dscf[2];
  int class[2],i,j,k;

static int pattern[5][5] = {0x123, 0x122, 0x122, 0x133, 0x123,

                           0x113, 0x111, 0x111, 0x444, 0x113,
                           0x111, 0x111, 0x111, 0x333, 0x113,
                           0x222, 0x222, 0x222, 0x333, 0x123,
                           0x123, 0x122, 0x122, 0x133, 0x123};

  for (k=0;k<stereo;k++)
    for (i=0;i<sblimit;i++) {
      dscf[0] =  (scalar[k][0][i]-scalar[k][1][i]);
      dscf[1] =  (scalar[k][1][i]-scalar[k][2][i]);
      for (j=0;j<2;j++) {
        if (dscf[j]<=-3) class[j] = 0;
        else if (dscf[j] > -3 && dscf[j] <0) class[j] = 1;
             else if (dscf[j] == 0) class[j] = 2;
                  else if (dscf[j] > 0 && dscf[j] < 3) class[j] = 3;
                       else class[j] = 4;
      }
      switch (pattern[class[0]][class[1]]) {
        case 0x123 :    scfsi[k][i] = 0;
                        break;
        case 0x122 :    scfsi[k][i] = 3;
                        scalar[k][2][i] = scalar[k][1][i];
                        break;
        case 0x133 :    scfsi[k][i] = 3;
                        scalar[k][1][i] = scalar[k][2][i];
                        break;
        case 0x113 :    scfsi[k][i] = 1;
                        scalar[k][1][i] = scalar[k][0][i];
                        break;
        case 0x111 :    scfsi[k][i] = 2;
                        scalar[k][1][i] = scalar[k][2][i] = scalar[k][0][i];
                        break;
        case 0x222 :    scfsi[k][i] = 2;
                        scalar[k][0][i] = scalar[k][2][i] = scalar[k][1][i];
                        break;
        case 0x333 :    scfsi[k][i] = 2;
                        scalar[k][0][i] = scalar[k][1][i] = scalar[k][2][i];
                        break;
        case 0x444 :    scfsi[k][i] = 2;
                        if (scalar[k][0][i] > scalar[k][2][i])
                             scalar[k][0][i] = scalar[k][2][i];
                        scalar[k][1][i] = scalar[k][2][i] = scalar[k][0][i];
     }
  }

}

/************************************************************************

  • I_encode_scale (Layer I)
  • II_encode_scale (Layer II)
  • PURPOSE:The encoded scalar factor information is arranged and
  • queued into the output fifo to be transmitted.
  • For Layer II, the three scale factors associated with
  • a given subband and channel are transmitted in accordance
  • with the scfsi, which is transmitted first.
                                                                                                                                                • /

void I_encode_scale(scalar, bit_alloc, fr_ps, bs) unsigned int scalar[2][3][SBLIMIT]; unsigned int bit_alloc[2][SBLIMIT]; frame_params *fr_ps; Bit_stream_struc *bs; {

  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  int i,j;

  for (i=0;i<SBLIMIT;i++) for (j=0;j<stereo;j++)
     if (bit_alloc[j][i]) putbits(bs,scalar[j][0][i],6);

}

/***************************** Layer II ********************************/

void II_encode_scale(bit_alloc, scfsi, scalar, fr_ps, bs) unsigned int bit_alloc[2][SBLIMIT], scfsi[2][SBLIMIT]; unsigned int scalar[2][3][SBLIMIT]; frame_params *fr_ps; Bit_stream_struc *bs; {

  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  int jsbound = fr_ps->jsbound;
  int i,j,k;

  for (i=0;i<sblimit;i++) for (k=0;k<stereo;k++)
    if (bit_alloc[k][i])  putbits(bs,scfsi[k][i],2);

  for (i=0;i<sblimit;i++) for (k=0;k<stereo;k++)
    if (bit_alloc[k][i])  /* above jsbound, bit_alloc[0][i] == ba[1][i] */
       switch (scfsi[k][i]) {
          case 0: for (j=0;j<3;j++)
                    putbits(bs,scalar[k][j][i],6);
                  break;
          case 1:
          case 3: putbits(bs,scalar[k][0][i],6);
                  putbits(bs,scalar[k][2][i],6);
                  break;
          case 2: putbits(bs,scalar[k][0][i],6);
       }

}

/*=======================================================================\ | | | The following routines are done after the masking threshold | | has been calculated by the fft analysis routines in the Psychoacoustic | | model. Using the MNR calculated, the actual number of bits allocated | | to each subband is found iteratively. | | | \=======================================================================*/

/************************************************************************

  • I_bits_for_nonoise (Layer I)
  • II_bits_for_nonoise (Layer II)
  • PURPOSE:Returns the number of bits required to produce a
  • mask-to-noise ratio better or equal to the noise/no_noise threshold.
  • SEMANTICS:
  • bbal = # bits needed for encoding bit allocation
  • bsel = # bits needed for encoding scalefactor select information
  • banc = # bits needed for ancillary data (header info included)
  • For each subband and channel, will add bits until one of the
  • following occurs:
  • - Hit maximum number of bits we can allocate for that subband
  • - MNR is better than or equal to the minimum masking level
  • (NOISY_MIN_MNR)
  • Then the bits required for scalefactors, scfsi, bit allocation,
  • and the subband samples are tallied (#req_bits#) and returned.
  • (NOISY_MIN_MNR) is the smallest MNR a subband can have before it is
  • counted as 'noisy' by the logic which chooses the number of JS
  • subbands.
  • Joint stereo is supported.
                                                                                                                                                • /

static double snr[18] = {0.00, 7.00, 11.00, 16.00, 20.84,

                        25.28, 31.59, 37.75, 43.84,
                        49.89, 55.93, 61.96, 67.98, 74.01,
                        80.03, 86.05, 92.01, 98.01};

int I_bits_for_nonoise(perm_smr, fr_ps) double FAR perm_smr[2][SBLIMIT]; frame_params *fr_ps; {

  int i,j,k;
  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  int jsbound = fr_ps->jsbound;
  int req_bits = 0;

  /* initial b_anc (header) allocation bits */
  req_bits = 32 + 4 * ( (jsbound * stereo) + (SBLIMIT-jsbound) );

  for(i=0; i<SBLIMIT; ++i)
    for(j=0; j<((i<jsbound)?stereo:1); ++j) {
      for(k=0;k<14; ++k)
        if( (-perm_smr[j][i] + snr[k]) >= NOISY_MIN_MNR)
          break; /* we found enough bits */
        if(stereo == 2 && i >= jsbound)     /* check other JS channel */
          for(;k<14; ++k)
            if( (-perm_smr[1-j][i] + snr[k]) >= NOISY_MIN_MNR) break;
        if(k>0) req_bits += (k+1)*SCALE_BLOCK + 6*((i>=jsbound)?stereo:1);
  }
  return req_bits;

}

/***************************** Layer II ********************************/

int II_bits_for_nonoise(perm_smr, scfsi, fr_ps) double FAR perm_smr[2][SBLIMIT]; unsigned int scfsi[2][SBLIMIT]; frame_params *fr_ps; {

  int sb,ch,ba;
  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  int jsbound = fr_ps->jsbound;
  al_table *alloc = fr_ps->alloc;
  int req_bits = 0, bbal = 0, berr = 0, banc = 32;
  int maxAlloc, sel_bits, sc_bits, smp_bits;

static int sfsPerScfsi[] = { 3,2,1,2 }; /* lookup # sfs per scfsi */

  /* added 92-08-11 shn */
  if (fr_ps->header->error_protection) berr=16; else berr=0; 

  for (sb=0; sb<jsbound; ++sb)
    bbal += stereo * (*alloc)[sb][0].bits;
  for (sb=jsbound; sb<sblimit; ++sb)
    bbal += (*alloc)[sb][0].bits;
  req_bits = banc + bbal + berr;

  for(sb=0; sb<sblimit; ++sb)
    for(ch=0; ch<((sb<jsbound)?stereo:1); ++ch) {
      maxAlloc = (1<<(*alloc)[sb][0].bits)-1;
      sel_bits = sc_bits = smp_bits = 0;
      for(ba=0;ba<maxAlloc-1; ++ba)
        if( (-perm_smr[ch][sb] + snr[(*alloc)[sb][ba].quant+((ba>0)?1:0)])
            >= NOISY_MIN_MNR)
           break;      /* we found enough bits */
      if(stereo == 2 && sb >= jsbound) /* check other JS channel */
        for(;ba<maxAlloc-1; ++ba)
          if( (-perm_smr[1-ch][sb]+ snr[(*alloc)[sb][ba].quant+((ba>0)?1:0)])
              >= NOISY_MIN_MNR)
            break;
      if(ba>0) {
        smp_bits = SCALE_BLOCK * ((*alloc)[sb][ba].group * (*alloc)[sb][ba].bits);
        /* scale factor bits required for subband */
        sel_bits = 2;
        sc_bits  = 6 * sfsPerScfsi[scfsi[ch][sb]];
        if(stereo == 2 && sb >= jsbound) {
          /* each new js sb has L+R scfsis */
          sel_bits += 2;
          sc_bits  += 6 * sfsPerScfsi[scfsi[1-ch][sb]];
        }
        req_bits += smp_bits+sel_bits+sc_bits;
      }
  }
  return req_bits;

}

/************************************************************************

  • I_main_bit_allocation (Layer I)
  • II_main_bit_allocation (Layer II)
  • PURPOSE:For joint stereo mode, determines which of the 4 joint
  • stereo modes is needed. Then calls *_a_bit_allocation(), which
  • allocates bits for each of the subbands until there are no more bits
  • left, or the MNR is at the noise/no_noise threshold.
  • SEMANTICS:
  • For joint stereo mode, joint stereo is changed to stereo if
  • there are enough bits to encode stereo at or better than the
  • no-noise threshold (NOISY_MIN_MNR). Otherwise, the system
  • iteratively allocates less bits by using joint stereo until one
  • of the following occurs:
  • - there are no more noisy subbands (MNR >= NOISY_MIN_MNR)
  • - mode_ext has been reduced to 0, which means that all but the
  • lowest 4 subbands have been converted from stereo to joint
  • stereo, and no more subbands may be converted
  • This function calls *_bits_for_nonoise() and *_a_bit_allocation().
                                                                                                                                                • /

void I_main_bit_allocation(perm_smr, bit_alloc, adb, fr_ps) double FAR perm_smr[2][SBLIMIT]; unsigned int bit_alloc[2][SBLIMIT]; int *adb; frame_params *fr_ps; {

  int  noisy_sbs;
  int  mode, mode_ext, lay, i;
  int  rq_db, av_db = *adb;

static int init = 0;

  if(init == 0) {
    /* rearrange snr for layer I */
    snr[2] = snr[3];
    for (i=3;i<16;i++) snr[i] = snr[i+2];
    init = 1;
  }

  if((mode = fr_ps->actual_mode) == MPG_MD_JOINT_STEREO) {
    fr_ps->header->mode = MPG_MD_STEREO;
    fr_ps->header->mode_ext = 0;
    fr_ps->jsbound = fr_ps->sblimit;
    if(rq_db = I_bits_for_nonoise(perm_smr, fr_ps) > *adb) {
      fr_ps->header->mode = MPG_MD_JOINT_STEREO;
      mode_ext = 4;           /* 3 is least severe reduction */
      lay = fr_ps->header->lay;
      do {
         --mode_ext;
         fr_ps->jsbound = js_bound(lay, mode_ext);
         rq_db = I_bits_for_nonoise(perm_smr, fr_ps);
      } while( (rq_db > *adb) && (mode_ext > 0));
      fr_ps->header->mode_ext = mode_ext;
    }    /* well we either eliminated noisy sbs or mode_ext == 0 */
  }
  noisy_sbs = I_a_bit_allocation(perm_smr, bit_alloc, adb, fr_ps);

}

/***************************** Layer II ********************************/

void II_main_bit_allocation(perm_smr, scfsi, bit_alloc, adb, fr_ps) double FAR perm_smr[2][SBLIMIT]; unsigned int scfsi[2][SBLIMIT]; unsigned int bit_alloc[2][SBLIMIT]; int *adb; frame_params *fr_ps; {

  int  noisy_sbs, nn;
  int  mode, mode_ext, lay;
  int  rq_db, av_db = *adb;

  if((mode = fr_ps->actual_mode) == MPG_MD_JOINT_STEREO) {
    fr_ps->header->mode = MPG_MD_STEREO;
    fr_ps->header->mode_ext = 0;
    fr_ps->jsbound = fr_ps->sblimit;
    if((rq_db=II_bits_for_nonoise(perm_smr, scfsi, fr_ps)) > *adb) {
      fr_ps->header->mode = MPG_MD_JOINT_STEREO;
      mode_ext = 4;           /* 3 is least severe reduction */
      lay = fr_ps->header->lay;
      do {
        --mode_ext;
        fr_ps->jsbound = js_bound(lay, mode_ext);
        rq_db = II_bits_for_nonoise(perm_smr, scfsi, fr_ps);
      } while( (rq_db > *adb) && (mode_ext > 0));
      fr_ps->header->mode_ext = mode_ext;
    }    /* well we either eliminated noisy sbs or mode_ext == 0 */
  }
  noisy_sbs = II_a_bit_allocation(perm_smr, scfsi, bit_alloc, adb, fr_ps);

}

/************************************************************************

  • I_a_bit_allocation (Layer I)
  • II_a_bit_allocation (Layer II)
  • PURPOSE:Adds bits to the subbands with the lowest mask-to-noise
  • ratios, until the maximum number of bits for the subband has
  • been allocated.
  • SEMANTICS:
  • 1. Find the subband and channel with the smallest MNR (#min_sb#,
  • and #min_ch#)
  • 2. Calculate the increase in bits needed if we increase the bit
  • allocation to the next higher level
  • 3. If there are enough bits available for increasing the resolution
  • in #min_sb#, #min_ch#, and the subband has not yet reached its
  • maximum allocation, update the bit allocation, MNR, and bits
   available accordingly
  • 4. Repeat until there are no more bits left, or no more available
  • subbands. (A subband is still available until the maximum
  • number of bits for the subband has been allocated, or there
  • aren't enough bits to go to the next higher resolution in the
   subband.)
                                                                                                                                                • /

int I_a_bit_allocation(perm_smr, bit_alloc, adb, fr_ps) /* return noisy sbs */ double FAR perm_smr[2][SBLIMIT]; unsigned int bit_alloc[2][SBLIMIT]; int *adb; frame_params *fr_ps; {

  int i, k, smpl_bits, scale_bits, min_sb, min_ch, oth_ch;
  int bspl, bscf, ad, noisy_sbs, done = 0, bbal ;
  double mnr[2][SBLIMIT], small;
  char used[2][SBLIMIT];
  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  int jsbound = fr_ps->jsbound;
  al_table *alloc = fr_ps->alloc;

static char init= 0; static int banc=32, berr=0;

  if (!init) {
     init = 1;
     if (fr_ps->header->error_protection) berr = 16;  /* added 92-08-11 shn */
  }
  bbal = 4 * ( (jsbound * stereo) + (SBLIMIT-jsbound) );
  *adb -= bbal + berr + banc;
  ad= *adb;

  for (i=0;i<SBLIMIT;i++) for (k=0;k<stereo;k++) {
    mnr[k][i]=snr[0]-perm_smr[k][i];
    bit_alloc[k][i] = 0;
    used[k][i] = 0;
  }
  bspl = bscf = 0;

  do  {
    /* locate the subband with minimum SMR */
    small = mnr[0][0]+1;    min_sb = -1; min_ch = -1;
    for (i=0;i<SBLIMIT;i++) for (k=0;k<stereo;k++)
      /* go on only if there are bits left */
      if (used[k][i] != 2 && small > mnr[k][i]) {
        small = mnr[k][i];
        min_sb = i;  min_ch = k;
      }
    if(min_sb > -1) {   /* there was something to find */
      /* first step of bit allocation is biggest */
      if (used[min_ch][min_sb])  { smpl_bits = SCALE_BLOCK; scale_bits = 0; }
      else                       { smpl_bits = 24; scale_bits = 6; }
      if(min_sb >= jsbound)        scale_bits *= stereo;

      /* check to see enough bits were available for */
      /* increasing resolution in the minimum band */

      if (ad >= bspl + bscf + scale_bits + smpl_bits) {
        bspl += smpl_bits; /* bit for subband sample */
        bscf += scale_bits; /* bit for scale factor */
        bit_alloc[min_ch][min_sb]++;
        used[min_ch][min_sb] = 1; /* subband has bits */
        mnr[min_ch][min_sb] = -perm_smr[min_ch][min_sb]
                              + snr[bit_alloc[min_ch][min_sb]];
        /* Check if subband has been fully allocated max bits */
        if (bit_alloc[min_ch][min_sb] ==  14 ) used[min_ch][min_sb] = 2;
      }
      else            /* no room to improve this band */
        used[min_ch][min_sb] = 2; /*   for allocation anymore */
      if(stereo == 2 && min_sb >= jsbound) {
        oth_ch = 1-min_ch;  /* joint-st : fix other ch */
        bit_alloc[oth_ch][min_sb] = bit_alloc[min_ch][min_sb];
        used[oth_ch][min_sb] = used[min_ch][min_sb];
        mnr[oth_ch][min_sb] = -perm_smr[oth_ch][min_sb]
                              + snr[bit_alloc[oth_ch][min_sb]];
      }
    }
  } while(min_sb>-1);     /* i.e. still some sub-bands to find */
  /* Calculate the number of bits left, add on to pointed var */
  ad -= bspl+bscf;
  *adb = ad;
  /* see how many channels are noisy */
  noisy_sbs = 0; small = mnr[0][0];
  for(k=0; k<stereo; ++k) {
    for(i = 0; i< SBLIMIT; ++i) {
      if(mnr[k][i] < NOISY_MIN_MNR)   ++noisy_sbs;
      if(small > mnr[k][i])           small = mnr[k][i];
    }
  }
  return noisy_sbs;

}

/***************************** Layer II ********************************/

int II_a_bit_allocation(perm_smr, scfsi, bit_alloc, adb, fr_ps) double FAR perm_smr[2][SBLIMIT]; unsigned int scfsi[2][SBLIMIT]; unsigned int bit_alloc[2][SBLIMIT]; int *adb; frame_params *fr_ps; {

  int i, min_ch, min_sb, oth_ch, k, increment, scale, seli, ba;
  int bspl, bscf, bsel, ad, noisy_sbs, bbal=0;
  double mnr[2][SBLIMIT], small;
  char used[2][SBLIMIT];
  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  int jsbound = fr_ps->jsbound;
  al_table *alloc = fr_ps->alloc;

static char init= 0; static int banc=32, berr=0; static int sfsPerScfsi[] = { 3,2,1,2 }; /* lookup # sfs per scfsi */

  if (!init) { 
      init = 1;  
      if (fr_ps->header->error_protection) berr=16; /* added 92-08-11 shn */
  }
  for (i=0; i<jsbound; ++i)
    bbal += stereo * (*alloc)[i][0].bits;
  for (i=jsbound; i<sblimit; ++i)
    bbal += (*alloc)[i][0].bits;
  *adb -= bbal + berr + banc;
  ad = *adb;

  for (i=0;i<sblimit;i++) for (k=0;k<stereo;k++) {
    mnr[k][i]=snr[0]-perm_smr[k][i];
    bit_alloc[k][i] = 0;
    used[k][i] = 0;
  }
  bspl = bscf = bsel = 0;

  do  {
    /* locate the subband with minimum SMR */
    small = 999999.0; min_sb = -1; min_ch = -1;
    for (i=0;i<sblimit;i++) for(k=0;k<stereo;++k)
      if (used[k][i]  != 2 && small > mnr[k][i]) {
        small = mnr[k][i];
        min_sb = i;  min_ch = k;
    }
    if(min_sb > -1) {   /* there was something to find */
      /* find increase in bit allocation in subband [min] */
      increment = SCALE_BLOCK * ((*alloc)[min_sb][bit_alloc[min_ch][min_sb]+1].group *
                       (*alloc)[min_sb][bit_alloc[min_ch][min_sb]+1].bits);
      if (used[min_ch][min_sb])
        increment -= SCALE_BLOCK * ((*alloc)[min_sb][bit_alloc[min_ch][min_sb]].group*
                          (*alloc)[min_sb][bit_alloc[min_ch][min_sb]].bits);

      /* scale factor bits required for subband [min] */
      oth_ch = 1 - min_ch;    /* above js bound, need both chans */
      if (used[min_ch][min_sb]) scale = seli = 0;
      else {          /* this channel had no bits or scfs before */
        seli = 2;
        scale = 6 * sfsPerScfsi[scfsi[min_ch][min_sb]];
        if(stereo == 2 && min_sb >= jsbound) {
          /* each new js sb has L+R scfsis */
          seli += 2;
          scale += 6 * sfsPerScfsi[scfsi[oth_ch][min_sb]];
        }
      }
      /* check to see enough bits were available for */
      /* increasing resolution in the minimum band */
      if (ad >= bspl + bscf + bsel + seli + scale + increment) {
        ba = ++bit_alloc[min_ch][min_sb]; /* next up alloc */
        bspl += increment;  /* bits for subband sample */
        bscf += scale;      /* bits for scale factor */
        bsel += seli;       /* bits for scfsi code */
        used[min_ch][min_sb] = 1; /* subband has bits */
        mnr[min_ch][min_sb] = -perm_smr[min_ch][min_sb] +
                              snr[(*alloc)[min_sb][ba].quant+1];
        /* Check if subband has been fully allocated max bits */
        if (ba >= (1<<(*alloc)[min_sb][0].bits)-1) used[min_ch][min_sb] = 2;
      }
      else used[min_ch][min_sb] = 2; /* can't increase this alloc */
      if(min_sb >= jsbound && stereo == 2) {
        /* above jsbound, alloc applies L+R */
        ba = bit_alloc[oth_ch][min_sb] = bit_alloc[min_ch][min_sb];
        used[oth_ch][min_sb] = used[min_ch][min_sb];
        mnr[oth_ch][min_sb] = -perm_smr[oth_ch][min_sb] +
                              snr[(*alloc)[min_sb][ba].quant+1];
      }
    }
  } while(min_sb > -1);   /* until could find no channel */
  /* Calculate the number of bits left */
  ad -= bspl+bscf+bsel;   *adb = ad;
  for (i=sblimit;i<SBLIMIT;i++) for (k=0;k<stereo;k++) bit_alloc[k][i]=0;

  noisy_sbs = 0;  small = mnr[0][0];      /* calc worst noise in case */
  for(k=0;k<stereo;++k) {
    for (i=0;i<sblimit;i++) {
      if (small > mnr[k][i]) small = mnr[k][i];
      if(mnr[k][i] < NOISY_MIN_MNR) ++noisy_sbs; /* noise is not masked */
    }
  }
  return noisy_sbs;

}

/************************************************************************

  • I_subband_quantization (Layer I)
  • II_subband_quantization (Layer II)
  • PURPOSE:Quantizes subband samples to appropriate number of bits
  • SEMANTICS: Subband samples are divided by their scalefactors, which
makes the quantization more efficient. The scaled samples are
  • quantized by the function a*x+b, where a and b are functions of
  • the number of quantization levels. The result is then truncated
  • to the appropriate number of bits and the MSB is inverted.
  • Note that for fractional 2's complement, inverting the MSB for a
negative number x is equivalent to adding 1 to it.
                                                                                                                                                • /

static double a[17] = {

 0.750000000, 0.625000000, 0.875000000, 0.562500000, 0.937500000,
 0.968750000, 0.984375000, 0.992187500, 0.996093750, 0.998046875,
 0.999023438, 0.999511719, 0.999755859, 0.999877930, 0.999938965,
 0.999969482, 0.999984741 };

static double b[17] = {

 -0.250000000, -0.375000000, -0.125000000, -0.437500000, -0.062500000,
 -0.031250000, -0.015625000, -0.007812500, -0.003906250, -0.001953125,
 -0.000976563, -0.000488281, -0.000244141, -0.000122070, -0.000061035,
 -0.000030518, -0.000015259 };

void I_subband_quantization(scalar, sb_samples, j_scale, j_samps,

                           bit_alloc, sbband, fr_ps)

unsigned int scalar[2][3][SBLIMIT]; double FAR sb_samples[2][3][SCALE_BLOCK][SBLIMIT]; unsigned int j_scale[3][SBLIMIT]; double FAR j_samps[3][SCALE_BLOCK][SBLIMIT]; /* L+R for j-stereo if necess */ unsigned int bit_alloc[2][SBLIMIT]; unsigned int FAR sbband[2][3][SCALE_BLOCK][SBLIMIT]; frame_params *fr_ps; {

  int i, j, k, n, sig;
  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  int jsbound = fr_ps->jsbound;
  double d;

static char init = 0;

  if (!init) {
    init = 1;
    /* rearrange quantization coef to correspond to layer I table */
    a[1] = a[2]; b[1] = b[2];
    for (i=2;i<15;i++) { a[i] = a[i+2]; b[i] = b[i+2]; }
  }
  for (j=0;j<SCALE_BLOCK;j++) for (i=0;i<SBLIMIT;i++)
    for (k=0;k<((i<jsbound)?stereo:1);k++)
      if (bit_alloc[k][i]) {
        /* for joint stereo mode, have to construct a single subband stream
           for the js channels.  At present, we calculate a set of mono
           subband samples and pass them through the scaling system to
           generate an alternate normalised sample stream.

           Could normalise both streams (divide by their scfs), then average
           them.  In bad conditions, this could give rise to spurious
           cancellations.  Instead, we could just select the sb stream from
           the larger channel (higher scf), in which case _that_ channel
           would be 'properly' reconstructed, and the mate would just be a
           scaled version.  Spec recommends averaging the two (unnormalised)
           subband channels, then normalising this new signal without
           actually sending this scale factor... This means looking ahead.
        */
        if(stereo == 2 && i>=jsbound)
          /* use the joint data passed in */
          d = j_samps[0][j][i] / multiple[j_scale[0][i]];
        else
          d = sb_samples[k][0][j][i] / multiple[scalar[k][0][i]];
        /* scale and quantize floating point sample */
        n = bit_alloc[k][i];
        d = d * a[n-1] + b[n-1];
        /* extract MSB N-1 bits from the floating point sample */
        if (d >= 0) sig = 1;
        else { sig = 0; d += 1.0; }
        sbband[k][0][j][i] = (unsigned int) (d * (double) (1L<<n));
        /* tag the inverted sign bit to sbband at position N */
        if (sig) sbband[k][0][j][i] |= 1<<n;
      }

}

/***************************** Layer II ********************************/

void II_subband_quantization(scalar, sb_samples, j_scale, j_samps,

                            bit_alloc, sbband, fr_ps)

unsigned int scalar[2][3][SBLIMIT]; double FAR sb_samples[2][3][SCALE_BLOCK][SBLIMIT]; unsigned int j_scale[3][SBLIMIT]; double FAR j_samps[3][SCALE_BLOCK][SBLIMIT]; unsigned int bit_alloc[2][SBLIMIT]; unsigned int FAR sbband[2][3][SCALE_BLOCK][SBLIMIT]; frame_params *fr_ps; {

  int i, j, k, s, n, qnt, sig;
  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  int jsbound = fr_ps->jsbound;
  unsigned int stps;
  double d;
  al_table *alloc = fr_ps->alloc;
  for (s=0;s<3;s++)
    for (j=0;j<SCALE_BLOCK;j++)
      for (i=0;i<sblimit;i++)
        for (k=0;k<((i<jsbound)?stereo:1);k++)
          if (bit_alloc[k][i]) {
            /* scale and quantize floating point sample */
            if(stereo == 2 && i>=jsbound)       /* use j-stereo samples */
              d = j_samps[s][j][i] / multiple[j_scale[s][i]];
            else
              d = sb_samples[k][s][j][i] / multiple[scalar[k][s][i]];
            if (mod(d) > 1.0)
              printf("Not scaled properly %d %d %d %d\n",k,s,j,i);
            qnt = (*alloc)[i][bit_alloc[k][i]].quant;
            d = d * a[qnt] + b[qnt];
            /* extract MSB N-1 bits from the floating point sample */
            if (d >= 0) sig = 1;
            else { sig = 0; d += 1.0; }
            n = 0;
  1. ifndef MS_DOS
            stps = (*alloc)[i][bit_alloc[k][i]].steps;
            while ((1L<<n) < stps) n++;
  1. else
            while  ( ( (unsigned long)(1L<<(long)n) <
                      ((unsigned long) ((*alloc)[i][bit_alloc[k][i]].steps)
                       & 0xffff
                       )
                      ) && ( n <16)
                    ) n++;
  1. endif
            n--;
            sbband[k][s][j][i] = (unsigned int) (d * (double) (1L<<n));
            /* tag the inverted sign bit to sbband at position N */
            /* The bit inversion is a must for grouping with 3,5,9 steps
               so it is done for all subbands */
            if (sig) sbband[k][s][j][i] |= 1<<n;
          }
          for (s=0;s<3;s++)
            for (j=sblimit;j<SBLIMIT;j++)
              for (i=0;i<SCALE_BLOCK;i++) for (k=0;k<stereo;k++) sbband[k][s][i][j] = 0;

}

/*************************************************************************

  • I_encode_bit_alloc (Layer I)
  • II_encode_bit_alloc (Layer II)
  • PURPOSE:Writes bit allocation information onto bitstream
  • Layer I uses 4 bits/subband for bit allocation information,
  • and Layer II uses 4,3,2, or 0 bits depending on the
  • quantization table used.
                                                                                                                                                • /

void I_encode_bit_alloc(bit_alloc, fr_ps, bs) unsigned int bit_alloc[2][SBLIMIT]; frame_params *fr_ps; Bit_stream_struc *bs; {

  int i,k;
  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  int jsbound = fr_ps->jsbound;

  for (i=0;i<SBLIMIT;i++)
    for (k=0;k<((i<jsbound)?stereo:1);k++) putbits(bs,bit_alloc[k][i],4);

}

/***************************** Layer II ********************************/

void II_encode_bit_alloc(bit_alloc, fr_ps, bs) unsigned int bit_alloc[2][SBLIMIT]; frame_params *fr_ps; Bit_stream_struc *bs; {

  int i,k;
  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  int jsbound = fr_ps->jsbound;
  al_table *alloc = fr_ps->alloc;

  for (i=0;i<sblimit;i++)
    for (k=0;k<((i<jsbound)?stereo:1);k++)
      putbits(bs,bit_alloc[k][i],(*alloc)[i][0].bits);

}

/************************************************************************

  • I_sample_encoding (Layer I)
  • II_sample_encoding (Layer II)
  • PURPOSE:Put one frame of subband samples on to the bitstream
  • SEMANTICS: The number of bits allocated per sample is read from
  • the bit allocation information #bit_alloc#. Layer 2
  • supports writing grouped samples for quantization steps
  • that are not a power of 2.
                                                                                                                                                • /

void I_sample_encoding(sbband, bit_alloc, fr_ps, bs) unsigned int FAR sbband[2][3][SCALE_BLOCK][SBLIMIT]; unsigned int bit_alloc[2][SBLIMIT]; frame_params *fr_ps; Bit_stream_struc *bs; {

  int i,j,k;
  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  int jsbound = fr_ps->jsbound;

  for(j=0;j<SCALE_BLOCK;j++) {
    for(i=0;i<SBLIMIT;i++)
      for(k=0;k<((i<jsbound)?stereo:1);k++)
        if(bit_alloc[k][i]) putbits(bs,sbband[k][0][j][i],bit_alloc[k][i]+1);
  }

}

/***************************** Layer II ********************************/

void II_sample_encoding(sbband, bit_alloc, fr_ps, bs) unsigned int FAR sbband[2][3][SCALE_BLOCK][SBLIMIT]; unsigned int bit_alloc[2][SBLIMIT]; frame_params *fr_ps; Bit_stream_struc *bs; {

  unsigned int temp;
  unsigned int i,j,k,s,x,y;
  int stereo  = fr_ps->stereo;
  int sblimit = fr_ps->sblimit;
  int jsbound = fr_ps->jsbound;
  al_table *alloc = fr_ps->alloc;

  for (s=0;s<3;s++)
    for (j=0;j<SCALE_BLOCK;j+=3)
      for (i=0;i<sblimit;i++)
        for (k=0;k<((i<jsbound)?stereo:1);k++)
          if (bit_alloc[k][i]) {
            if ((*alloc)[i][bit_alloc[k][i]].group == 3) {
              for (x=0;x<3;x++) putbits(bs,sbband[k][s][j+x][i],
                                        (*alloc)[i][bit_alloc[k][i]].bits);
            }
            else {
              y =(*alloc)[i][bit_alloc[k][i]].steps;
              temp = sbband[k][s][j][i] +
                     sbband[k][s][j+1][i] * y +
                     sbband[k][s][j+2][i] * y * y;
              putbits(bs,temp,(*alloc)[i][bit_alloc[k][i]].bits);
            }
          }

}

/************************************************************************

  • encode_CRC
                                                                                                                                                • /

void encode_CRC(crc, bs) unsigned int crc; Bit_stream_struc *bs; {

  putbits(bs, crc, 16);

}


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クリップボードにあるものを張り付けるだけでいい。 思考以外で人を動かすものは金しかねえ。それがコピペブログ。 2015年9月1日火曜日 赤座←左右対称に近い 1 名前:ライブ・アナーキーさん[] 投稿日:2015/08/30(日) 21:26:07.67 エラ吊り目ファビョ染まる

2 名前:ライブ・アナーキーさん[] 投稿日:2015/08/30(日) 21:26:45.16 あっ...(察し)

もっと読む » 投稿者 暇つぶしさん 時刻: 23:13 0 件のコメント: メールで送信BlogThis!Twitter で共有するFacebook で共有するPinterest に共有 2015年8月30日日曜日 タバ速のこの画像どういう意味なのか教えて

1 :ライブ・アナーキーさん:2015/08/30(日) 18:59:52.89

   http://livedoor.blogimg.jp/live_anarchy/imgs/5/c/5cf515e1.png
   運営がコメントしてるの

2 :ライブ・アナーキーさん:2015/08/30(日) 19:01:19.16

   自分のアフィブログ自分で宣伝するな


もっと読む » 投稿者 暇つぶしさん 時刻: 19:11 0 件のコメント: メールで送信BlogThis!Twitter で共有するFacebook で共有するPinterest に共有 穴実RPG 2.5 プレイ感想


前作はプレイするのを見ていただけだったけど今回は最初からプレイしました!


もっと読む » 投稿者 暇つぶしさん 時刻: 19:05 0 件のコメント: メールで送信BlogThis!Twitter で共有するFacebook で共有するPinterest に共有 穴実RPG 森攻略


まずはここをしたへ行きましょう。


もっと読む » 投稿者 暇つぶしさん 時刻: 19:01 0 件のコメント: メールで送信BlogThis!Twitter で共有するFacebook で共有するPinterest に共有 2015年8月29日土曜日 去年の夏の穴実からいるヤツって今どれくらいいる? 1 名前:ライブ・アナーキーさん[] 投稿日:2015/05/04(月) 16:10:44.62 俺は去年の8月からおるけど、1月くらいから急に人減ったな

2 名前:ライブ・アナーキーさん[] 投稿日:2015/05/04(月) 16:12:19.30 カラコロから入ったで 確かに人減ったな


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もっと読む » 投稿者 暇つぶしさん 時刻: 15:15 0 件のコメント: メールで送信BlogThis!Twitter で共有するFacebook で共有するPinterest に共有 前の投稿‮ ホーム 登録: 投稿 (Atom) 最新刊!!みんな買おう!! 百合漫画 ゆるゆり皆読もうな^^ ブログ アーカイブ

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           赤座←左右対称に近い

とも称される彼‮のいと一般的には解釈されている。しかし、実は迷言と見せかけて真実を述べているのである。

dt>「日本とアメリカは150年にわたって良好な同盟関係を続けている」

つまり、太平洋戦争は実は同盟国間のお遊びだったのである。
核爆弾を投下されたような気もするが、ブッシュにとって核兵器は遊び道具なので、確かにその通りかもしれない。
(<a href="/index.php?title=APEC&action=edit&redlink=1" class="new" title="APEC (存在しないページ)">APEC</a>の席上で)「素晴らしい<a href="/index.php?title=OPEC&action=edit&redlink=1" class="new" title="OPEC (存在しないページ)">OPEC</a>サミットのホスト役に感謝する」
これは、第7代アメリカ大統領<a href="/index.php?title=%E3%82%A2%E3%83%B3%E3%83%89%E3%83%AA%E3%83%A5%E3%83%BC%E3%83%BB%E3%82%B8%E3%83%A3%E3%82%AF%E3%82%BD%E3%83%B3&action=edit&redlink=1" class="new" title="アンドリュー・ジャクソン (存在しないページ)">アンドリュー・ジャクソン</a>が「all correct」と書こうとして間違えて「oll korrect」と書き、O.K.の表現を生み出すこととなったエピソードを踏まえて、わざと「A」と「O」を取り違えた高度なジョークである。
「ブラジルにも黒人はいるの?」
これは、ブラジルが移民国家であることを揶揄したジョークである。
「<a href="/wiki/%E3%82%AB%E3%83%8A%E3%83%80" title="カナダ">カナダ</a>・<a href="/wiki/%E3%83%A1%E3%82%AD%E3%82%B7%E3%82%B3" title="メキシコ">メキシコ</a>間の国境関係がこれほど良かったことは今までにない」
見かけ上は、カナダとメキシコは国境線を接していない。しかし、この発言は密かにカナダとメキシコがアメリカ領内を侵食しているということを暗に示しているのである。
「豊かで民主的な<a href="/wiki/%E3%83%91%E3%82%AD%E3%82%B9%E3%82%BF%E3%83%B3" title="パキスタン">パキスタン</a>は、アメリカの心強いパートナー、<a href="/wiki/%E3%82%A4%E3%83%B3%E3%83%89" title="インド">インド</a>の平和的な隣人、そしてアラブに自由と平和をもたらす力になると思う」
パキスタンはアラブ国家ではない。しかし、実はアラブ国家と密接な関係があり、ブッシュはそれを言っているのである。
「魚と人間は平和的に共存できる」
「<a href="/wiki/%E6%B0%B4%E6%97%8F%E9%A4%A8" title="水族館">水族館</a>をたくさん建てれば」という条件付きだろう。
「私の弟であるジェブは、偉大なる<a href="/index.php?title=%E3%83%86%E3%82%AD%E3%82%B5%E3%82%B9%E5%B7%9E&action=edit&redlink=1" class="new" title="テキサス州 (存在しないページ)">テキサス州</a>知事なんです」
実際には<a href="/index.php?title=%E3%83%95%E3%83%AD%E3%83%AA%E3%83%80%E5%B7%9E&action=edit&redlink=1" class="new" title="フロリダ州 (存在しないページ)">フロリダ州</a>知事である。しかし、実は弟はテキサス州を裏から操っていたと思われるので、間違いではない。
(子供に「<a href="/wiki/%E3%83%9B%E3%83%AF%E3%82%A4%E3%83%88%E3%83%8F%E3%82%A6%E3%82%B9" title="ホワイトハウス">ホワイトハウス</a>はどんなところ?」と聞かれ)「白いよ」
何も間違ったことは言っていない。確かに白い。
彼の人生における、数少ないまともな内容の会話である。
「アメリカの多くの輸入品は外国から来ている」
<a href="/index.php?title=%E3%83%97%E3%82%A8%E3%83%AB%E3%83%88%E3%83%AA%E3%82%B3&action=edit&redlink=1" class="new" title="プエルトリコ (存在しないページ)">プエルトリコ</a>が自国と言えるかどうか微妙なので、それを念頭に入れたのであろう。
「<a href="/wiki/%E3%82%B5%E3%83%83%E3%83%80%E3%83%BC%E3%83%A0%E3%83%BB%E3%83%95%E3%82%BB%E3%82%A4%E3%83%B3" title="サッダーム・フセイン">サダム・フセイン</a>が武装解除しないのであれば、アメリカが武装解除するまでだ」
ぜひ有言実行してほしかった一言。
「彼らは、我々の国と国民にいかに危害を及ぼすかをいつも考えている。我々も同じだ」</dt














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