libogg and libvorbis are no longer part of this source tree

1 files changed, 0 insertions, 461 deletions

diff --git a/contrib/vorbis/lib/codebook.c b/contrib/vorbis/lib/codebook.c
deleted file mode 100644
index 78672e2..0000000
--- a/contrib/vorbis/lib/codebook.c
+++ /dev/null
@@ -1,461 +0,0 @@
-/********************************************************************
- *                                                                  *
- * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
- * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
- * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
- * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
- *                                                                  *
- * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2015             *
- * by the Xiph.Org Foundation http://www.xiph.org/                  *
- *                                                                  *
- ********************************************************************
-
- function: basic codebook pack/unpack/code/decode operations
-
- ********************************************************************/
-
-#include <stdlib.h>
-#include <string.h>
-#include <math.h>
-#include <ogg/ogg.h>
-#include "vorbis/codec.h"
-#include "codebook.h"
-#include "scales.h"
-#include "misc.h"
-#include "os.h"
-
-/* packs the given codebook into the bitstream **************************/
-
-int vorbis_staticbook_pack(const static_codebook *c,oggpack_buffer *opb){
-  long i,j;
-  int ordered=0;
-
-  /* first the basic parameters */
-  oggpack_write(opb,0x564342,24);
-  oggpack_write(opb,c->dim,16);
-  oggpack_write(opb,c->entries,24);
-
-  /* pack the codewords.  There are two packings; length ordered and
-     length random.  Decide between the two now. */
-
-  for(i=1;i<c->entries;i++)
-    if(c->lengthlist[i-1]==0 || c->lengthlist[i]<c->lengthlist[i-1])break;
-  if(i==c->entries)ordered=1;
-
-  if(ordered){
-    /* length ordered.  We only need to say how many codewords of
-       each length.  The actual codewords are generated
-       deterministically */
-
-    long count=0;
-    oggpack_write(opb,1,1);  /* ordered */
-    oggpack_write(opb,c->lengthlist[0]-1,5); /* 1 to 32 */
-
-    for(i=1;i<c->entries;i++){
-      char this=c->lengthlist[i];
-      char last=c->lengthlist[i-1];
-      if(this>last){
-        for(j=last;j<this;j++){
-          oggpack_write(opb,i-count,ov_ilog(c->entries-count));
-          count=i;
-        }
-      }
-    }
-    oggpack_write(opb,i-count,ov_ilog(c->entries-count));
-
-  }else{
-    /* length random.  Again, we don't code the codeword itself, just
-       the length.  This time, though, we have to encode each length */
-    oggpack_write(opb,0,1);   /* unordered */
-
-    /* algortihmic mapping has use for 'unused entries', which we tag
-       here.  The algorithmic mapping happens as usual, but the unused
-       entry has no codeword. */
-    for(i=0;i<c->entries;i++)
-      if(c->lengthlist[i]==0)break;
-
-    if(i==c->entries){
-      oggpack_write(opb,0,1); /* no unused entries */
-      for(i=0;i<c->entries;i++)
-        oggpack_write(opb,c->lengthlist[i]-1,5);
-    }else{
-      oggpack_write(opb,1,1); /* we have unused entries; thus we tag */
-      for(i=0;i<c->entries;i++){
-        if(c->lengthlist[i]==0){
-          oggpack_write(opb,0,1);
-        }else{
-          oggpack_write(opb,1,1);
-          oggpack_write(opb,c->lengthlist[i]-1,5);
-        }
-      }
-    }
-  }
-
-  /* is the entry number the desired return value, or do we have a
-     mapping? If we have a mapping, what type? */
-  oggpack_write(opb,c->maptype,4);
-  switch(c->maptype){
-  case 0:
-    /* no mapping */
-    break;
-  case 1:case 2:
-    /* implicitly populated value mapping */
-    /* explicitly populated value mapping */
-
-    if(!c->quantlist){
-      /* no quantlist?  error */
-      return(-1);
-    }
-
-    /* values that define the dequantization */
-    oggpack_write(opb,c->q_min,32);
-    oggpack_write(opb,c->q_delta,32);
-    oggpack_write(opb,c->q_quant-1,4);
-    oggpack_write(opb,c->q_sequencep,1);
-
-    {
-      int quantvals;
-      switch(c->maptype){
-      case 1:
-        /* a single column of (c->entries/c->dim) quantized values for
-           building a full value list algorithmically (square lattice) */
-        quantvals=_book_maptype1_quantvals(c);
-        break;
-      case 2:
-        /* every value (c->entries*c->dim total) specified explicitly */
-        quantvals=c->entries*c->dim;
-        break;
-      default: /* NOT_REACHABLE */
-        quantvals=-1;
-      }
-
-      /* quantized values */
-      for(i=0;i<quantvals;i++)
-        oggpack_write(opb,labs(c->quantlist[i]),c->q_quant);
-
-    }
-    break;
-  default:
-    /* error case; we don't have any other map types now */
-    return(-1);
-  }
-
-  return(0);
-}
-
-/* unpacks a codebook from the packet buffer into the codebook struct,
-   readies the codebook auxiliary structures for decode *************/
-static_codebook *vorbis_staticbook_unpack(oggpack_buffer *opb){
-  long i,j;
-  static_codebook *s=_ogg_calloc(1,sizeof(*s));
-  s->allocedp=1;
-
-  /* make sure alignment is correct */
-  if(oggpack_read(opb,24)!=0x564342)goto _eofout;
-
-  /* first the basic parameters */
-  s->dim=oggpack_read(opb,16);
-  s->entries=oggpack_read(opb,24);
-  if(s->entries==-1)goto _eofout;
-
-  if(ov_ilog(s->dim)+ov_ilog(s->entries)>24)goto _eofout;
-
-  /* codeword ordering.... length ordered or unordered? */
-  switch((int)oggpack_read(opb,1)){
-  case 0:{
-    long unused;
-    /* allocated but unused entries? */
-    unused=oggpack_read(opb,1);
-    if((s->entries*(unused?1:5)+7)>>3>opb->storage-oggpack_bytes(opb))
-      goto _eofout;
-    /* unordered */
-    s->lengthlist=_ogg_malloc(sizeof(*s->lengthlist)*s->entries);
-
-    /* allocated but unused entries? */
-    if(unused){
-      /* yes, unused entries */
-
-      for(i=0;i<s->entries;i++){
-        if(oggpack_read(opb,1)){
-          long num=oggpack_read(opb,5);
-          if(num==-1)goto _eofout;
-          s->lengthlist[i]=num+1;
-        }else
-          s->lengthlist[i]=0;
-      }
-    }else{
-      /* all entries used; no tagging */
-      for(i=0;i<s->entries;i++){
-        long num=oggpack_read(opb,5);
-        if(num==-1)goto _eofout;
-        s->lengthlist[i]=num+1;
-      }
-    }
-
-    break;
-  }
-  case 1:
-    /* ordered */
-    {
-      long length=oggpack_read(opb,5)+1;
-      if(length==0)goto _eofout;
-      s->lengthlist=_ogg_malloc(sizeof(*s->lengthlist)*s->entries);
-
-      for(i=0;i<s->entries;){
-        long num=oggpack_read(opb,ov_ilog(s->entries-i));
-        if(num==-1)goto _eofout;
-        if(length>32 || num>s->entries-i ||
-           (num>0 && (num-1)>>(length-1)>1)){
-          goto _errout;
-        }
-        if(length>32)goto _errout;
-        for(j=0;j<num;j++,i++)
-          s->lengthlist[i]=length;
-        length++;
-      }
-    }
-    break;
-  default:
-    /* EOF */
-    goto _eofout;
-  }
-
-  /* Do we have a mapping to unpack? */
-  switch((s->maptype=oggpack_read(opb,4))){
-  case 0:
-    /* no mapping */
-    break;
-  case 1: case 2:
-    /* implicitly populated value mapping */
-    /* explicitly populated value mapping */
-
-    s->q_min=oggpack_read(opb,32);
-    s->q_delta=oggpack_read(opb,32);
-    s->q_quant=oggpack_read(opb,4)+1;
-    s->q_sequencep=oggpack_read(opb,1);
-    if(s->q_sequencep==-1)goto _eofout;
-
-    {
-      int quantvals=0;
-      switch(s->maptype){
-      case 1:
-        quantvals=(s->dim==0?0:_book_maptype1_quantvals(s));
-        break;
-      case 2:
-        quantvals=s->entries*s->dim;
-        break;
-      }
-
-      /* quantized values */
-      if(((quantvals*s->q_quant+7)>>3)>opb->storage-oggpack_bytes(opb))
-        goto _eofout;
-      s->quantlist=_ogg_malloc(sizeof(*s->quantlist)*quantvals);
-      for(i=0;i<quantvals;i++)
-        s->quantlist[i]=oggpack_read(opb,s->q_quant);
-
-      if(quantvals&&s->quantlist[quantvals-1]==-1)goto _eofout;
-    }
-    break;
-  default:
-    goto _errout;
-  }
-
-  /* all set */
-  return(s);
-
- _errout:
- _eofout:
-  vorbis_staticbook_destroy(s);
-  return(NULL);
-}
-
-/* returns the number of bits ************************************************/
-int vorbis_book_encode(codebook *book, int a, oggpack_buffer *b){
-  if(a<0 || a>=book->c->entries)return(0);
-  oggpack_write(b,book->codelist[a],book->c->lengthlist[a]);
-  return(book->c->lengthlist[a]);
-}
-
-/* the 'eliminate the decode tree' optimization actually requires the
-   codewords to be MSb first, not LSb.  This is an annoying inelegancy
-   (and one of the first places where carefully thought out design
-   turned out to be wrong; Vorbis II and future Ogg codecs should go
-   to an MSb bitpacker), but not actually the huge hit it appears to
-   be.  The first-stage decode table catches most words so that
-   bitreverse is not in the main execution path. */
-
-static ogg_uint32_t bitreverse(ogg_uint32_t x){
-  x=    ((x>>16)&0x0000ffff) | ((x<<16)&0xffff0000);
-  x=    ((x>> 8)&0x00ff00ff) | ((x<< 8)&0xff00ff00);
-  x=    ((x>> 4)&0x0f0f0f0f) | ((x<< 4)&0xf0f0f0f0);
-  x=    ((x>> 2)&0x33333333) | ((x<< 2)&0xcccccccc);
-  return((x>> 1)&0x55555555) | ((x<< 1)&0xaaaaaaaa);
-}
-
-STIN long decode_packed_entry_number(codebook *book, oggpack_buffer *b){
-  int  read=book->dec_maxlength;
-  long lo,hi;
-  long lok = oggpack_look(b,book->dec_firsttablen);
-
-  if (lok >= 0) {
-    long entry = book->dec_firsttable[lok];
-    if(entry&0x80000000UL){
-      lo=(entry>>15)&0x7fff;
-      hi=book->used_entries-(entry&0x7fff);
-    }else{
-      oggpack_adv(b, book->dec_codelengths[entry-1]);
-      return(entry-1);
-    }
-  }else{
-    lo=0;
-    hi=book->used_entries;
-  }
-
-  /* Single entry codebooks use a firsttablen of 1 and a
-     dec_maxlength of 1.  If a single-entry codebook gets here (due to
-     failure to read one bit above), the next look attempt will also
-     fail and we'll correctly kick out instead of trying to walk the
-     underformed tree */
-
-  lok = oggpack_look(b, read);
-
-  while(lok<0 && read>1)
-    lok = oggpack_look(b, --read);
-  if(lok<0)return -1;
-
-  /* bisect search for the codeword in the ordered list */
-  {
-    ogg_uint32_t testword=bitreverse((ogg_uint32_t)lok);
-
-    while(hi-lo>1){
-      long p=(hi-lo)>>1;
-      long test=book->codelist[lo+p]>testword;
-      lo+=p&(test-1);
-      hi-=p&(-test);
-      }
-
-    if(book->dec_codelengths[lo]<=read){
-      oggpack_adv(b, book->dec_codelengths[lo]);
-      return(lo);
-    }
-  }
-
-  oggpack_adv(b, read);
-
-  return(-1);
-}
-
-/* Decode side is specced and easier, because we don't need to find
-   matches using different criteria; we simply read and map.  There are
-   two things we need to do 'depending':
-
-   We may need to support interleave.  We don't really, but it's
-   convenient to do it here rather than rebuild the vector later.
-
-   Cascades may be additive or multiplicitive; this is not inherent in
-   the codebook, but set in the code using the codebook.  Like
-   interleaving, it's easiest to do it here.
-   addmul==0 -> declarative (set the value)
-   addmul==1 -> additive
-   addmul==2 -> multiplicitive */
-
-/* returns the [original, not compacted] entry number or -1 on eof *********/
-long vorbis_book_decode(codebook *book, oggpack_buffer *b){
-  if(book->used_entries>0){
-    long packed_entry=decode_packed_entry_number(book,b);
-    if(packed_entry>=0)
-      return(book->dec_index[packed_entry]);
-  }
-
-  /* if there's no dec_index, the codebook unpacking isn't collapsed */
-  return(-1);
-}
-
-/* returns 0 on OK or -1 on eof *************************************/
-/* decode vector / dim granularity gaurding is done in the upper layer */
-long vorbis_book_decodevs_add(codebook *book,float *a,oggpack_buffer *b,int n){
-  if(book->used_entries>0){
-    int step=n/book->dim;
-    long *entry = alloca(sizeof(*entry)*step);
-    float **t = alloca(sizeof(*t)*step);
-    int i,j,o;
-
-    for (i = 0; i < step; i++) {
-      entry[i]=decode_packed_entry_number(book,b);
-      if(entry[i]==-1)return(-1);
-      t[i] = book->valuelist+entry[i]*book->dim;
-    }
-    for(i=0,o=0;i<book->dim;i++,o+=step)
-      for (j=0;o+j<n && j<step;j++)
-        a[o+j]+=t[j][i];
-  }
-  return(0);
-}
-
-/* decode vector / dim granularity gaurding is done in the upper layer */
-long vorbis_book_decodev_add(codebook *book,float *a,oggpack_buffer *b,int n){
-  if(book->used_entries>0){
-    int i,j,entry;
-    float *t;
-
-    for(i=0;i<n;){
-      entry = decode_packed_entry_number(book,b);
-      if(entry==-1)return(-1);
-      t     = book->valuelist+entry*book->dim;
-      for(j=0;i<n && j<book->dim;)
-        a[i++]+=t[j++];
-    }
-  }
-  return(0);
-}
-
-/* unlike the others, we guard against n not being an integer number
-   of <dim> internally rather than in the upper layer (called only by
-   floor0) */
-long vorbis_book_decodev_set(codebook *book,float *a,oggpack_buffer *b,int n){
-  if(book->used_entries>0){
-    int i,j,entry;
-    float *t;
-
-    for(i=0;i<n;){
-      entry = decode_packed_entry_number(book,b);
-      if(entry==-1)return(-1);
-      t     = book->valuelist+entry*book->dim;
-      for (j=0;i<n && j<book->dim;){
-        a[i++]=t[j++];
-      }
-    }
-  }else{
-    int i;
-
-    for(i=0;i<n;){
-      a[i++]=0.f;
-    }
-  }
-  return(0);
-}
-
-long vorbis_book_decodevv_add(codebook *book,float **a,long offset,int ch,
-                              oggpack_buffer *b,int n){
-
-  long i,j,entry;
-  int chptr=0;
-  if(book->used_entries>0){
-    int m=(offset+n)/ch;
-    for(i=offset/ch;i<m;){
-      entry = decode_packed_entry_number(book,b);
-      if(entry==-1)return(-1);
-      {
-        const float *t = book->valuelist+entry*book->dim;
-        for (j=0;i<m && j<book->dim;j++){
-          a[chptr++][i]+=t[j];
-          if(chptr==ch){
-            chptr=0;
-            i++;
-          }
-        }
-      }
-    }
-  }
-  return(0);
-}