theora: Move to a module and split thirdparty lib

Same rationale as the previous commits.

1 files changed, 0 insertions, 1227 deletions

diff --git a/drivers/theora/state.c b/drivers/theora/state.c
deleted file mode 100644
index 42ed33a9a3..0000000000
--- a/drivers/theora/state.c
+++ /dev/null
@@ -1,1227 +0,0 @@
-/********************************************************************
- *                                                                  *
- * THIS FILE IS PART OF THE OggTheora 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 Theora SOURCE CODE IS COPYRIGHT (C) 2002-2009                *
- * by the Xiph.Org Foundation and contributors http://www.xiph.org/ *
- *                                                                  *
- ********************************************************************
-
-  function:
-    last mod: $Id: state.c 16503 2009-08-22 18:14:02Z giles $
-
- ********************************************************************/
-
-#include <stdlib.h>
-#include <string.h>
-#include "internal.h"
-#if defined(OC_X86_ASM)
-#if defined(_MSC_VER)
-# include "x86_vc/x86int.h"
-#else
-# include "x86/x86int.h"
-#endif
-#endif
-#if defined(OC_DUMP_IMAGES)
-# include <stdio.h>
-# include "png.h"
-#endif
-
-/*Returns the fragment index of the top-left block in a macro block.
-  This can be used to test whether or not the whole macro block is valid.
-  _sb_map: The super block map.
-  _quadi:  The quadrant number.
-  Return: The index of the fragment of the upper left block in the macro
-   block, or -1 if the block lies outside the coded frame.*/
-static ptrdiff_t oc_sb_quad_top_left_frag(oc_sb_map_quad _sb_map[4],int _quadi){
-  /*It so happens that under the Hilbert curve ordering described below, the
-     upper-left block in each macro block is at index 0, except in macro block
-     3, where it is at index 2.*/
-  return _sb_map[_quadi][_quadi&_quadi<<1];
-}
-
-/*Fills in the mapping from block positions to fragment numbers for a single
-   color plane.
-  This function also fills in the "valid" flag of each quadrant in the super
-   block flags.
-  _sb_maps:  The array of super block maps for the color plane.
-  _sb_flags: The array of super block flags for the color plane.
-  _frag0:    The index of the first fragment in the plane.
-  _hfrags:   The number of horizontal fragments in a coded frame.
-  _vfrags:   The number of vertical fragments in a coded frame.*/
-static void oc_sb_create_plane_mapping(oc_sb_map _sb_maps[],
- oc_sb_flags _sb_flags[],ptrdiff_t _frag0,int _hfrags,int _vfrags){
-  /*Contains the (macro_block,block) indices for a 4x4 grid of
-     fragments.
-    The pattern is a 4x4 Hilbert space-filling curve.
-    A Hilbert curve has the nice property that as the curve grows larger, its
-     fractal dimension approaches 2.
-    The intuition is that nearby blocks in the curve are also close spatially,
-     with the previous element always an immediate neighbor, so that runs of
-     blocks should be well correlated.*/
-  static const int SB_MAP[4][4][2]={
-    {{0,0},{0,1},{3,2},{3,3}},
-    {{0,3},{0,2},{3,1},{3,0}},
-    {{1,0},{1,3},{2,0},{2,3}},
-    {{1,1},{1,2},{2,1},{2,2}}
-  };
-  ptrdiff_t  yfrag;
-  unsigned   sbi;
-  int        y;
-  sbi=0;
-  yfrag=_frag0;
-  for(y=0;;y+=4){
-    int imax;
-    int x;
-    /*Figure out how many columns of blocks in this super block lie within the
-       image.*/
-    imax=_vfrags-y;
-    if(imax>4)imax=4;
-    else if(imax<=0)break;
-    for(x=0;;x+=4,sbi++){
-      ptrdiff_t xfrag;
-      int       jmax;
-      int       quadi;
-      int       i;
-      /*Figure out how many rows of blocks in this super block lie within the
-         image.*/
-      jmax=_hfrags-x;
-      if(jmax>4)jmax=4;
-      else if(jmax<=0)break;
-      /*By default, set all fragment indices to -1.*/
-      memset(_sb_maps[sbi][0],0xFF,sizeof(_sb_maps[sbi]));
-      /*Fill in the fragment map for this super block.*/
-      xfrag=yfrag+x;
-      for(i=0;i<imax;i++){
-        int j;
-        for(j=0;j<jmax;j++){
-          _sb_maps[sbi][SB_MAP[i][j][0]][SB_MAP[i][j][1]]=xfrag+j;
-        }
-        xfrag+=_hfrags;
-      }
-      /*Mark which quadrants of this super block lie within the image.*/
-      for(quadi=0;quadi<4;quadi++){
-        _sb_flags[sbi].quad_valid|=
-         (oc_sb_quad_top_left_frag(_sb_maps[sbi],quadi)>=0)<<quadi;
-      }
-    }
-    yfrag+=_hfrags<<2;
-  }
-}
-
-/*Fills in the Y plane fragment map for a macro block given the fragment
-   coordinates of its upper-left hand corner.
-  _mb_map:    The macro block map to fill.
-  _fplane: The description of the Y plane.
-  _xfrag0: The X location of the upper-left hand fragment in the luma plane.
-  _yfrag0: The Y location of the upper-left hand fragment in the luma plane.*/
-static void oc_mb_fill_ymapping(oc_mb_map_plane _mb_map[3],
- const oc_fragment_plane *_fplane,int _xfrag0,int _yfrag0){
-  int i;
-  int j;
-  for(i=0;i<2;i++)for(j=0;j<2;j++){
-    _mb_map[0][i<<1|j]=(_yfrag0+i)*(ptrdiff_t)_fplane->nhfrags+_xfrag0+j;
-  }
-}
-
-/*Fills in the chroma plane fragment maps for a macro block.
-  This version is for use with chroma decimated in the X and Y directions
-   (4:2:0).
-  _mb_map:  The macro block map to fill.
-  _fplanes: The descriptions of the fragment planes.
-  _xfrag0:  The X location of the upper-left hand fragment in the luma plane.
-  _yfrag0:  The Y location of the upper-left hand fragment in the luma plane.*/
-static void oc_mb_fill_cmapping00(oc_mb_map_plane _mb_map[3],
- const oc_fragment_plane _fplanes[3],int _xfrag0,int _yfrag0){
-  ptrdiff_t fragi;
-  _xfrag0>>=1;
-  _yfrag0>>=1;
-  fragi=_yfrag0*(ptrdiff_t)_fplanes[1].nhfrags+_xfrag0;
-  _mb_map[1][0]=fragi+_fplanes[1].froffset;
-  _mb_map[2][0]=fragi+_fplanes[2].froffset;
-}
-
-/*Fills in the chroma plane fragment maps for a macro block.
-  This version is for use with chroma decimated in the Y direction.
-  _mb_map:  The macro block map to fill.
-  _fplanes: The descriptions of the fragment planes.
-  _xfrag0:  The X location of the upper-left hand fragment in the luma plane.
-  _yfrag0:  The Y location of the upper-left hand fragment in the luma plane.*/
-static void oc_mb_fill_cmapping01(oc_mb_map_plane _mb_map[3],
- const oc_fragment_plane _fplanes[3],int _xfrag0,int _yfrag0){
-  ptrdiff_t fragi;
-  int       j;
-  _yfrag0>>=1;
-  fragi=_yfrag0*(ptrdiff_t)_fplanes[1].nhfrags+_xfrag0;
-  for(j=0;j<2;j++){
-    _mb_map[1][j]=fragi+_fplanes[1].froffset;
-    _mb_map[2][j]=fragi+_fplanes[2].froffset;
-    fragi++;
-  }
-}
-
-/*Fills in the chroma plane fragment maps for a macro block.
-  This version is for use with chroma decimated in the X direction (4:2:2).
-  _mb_map:  The macro block map to fill.
-  _fplanes: The descriptions of the fragment planes.
-  _xfrag0:  The X location of the upper-left hand fragment in the luma plane.
-  _yfrag0:  The Y location of the upper-left hand fragment in the luma plane.*/
-static void oc_mb_fill_cmapping10(oc_mb_map_plane _mb_map[3],
- const oc_fragment_plane _fplanes[3],int _xfrag0,int _yfrag0){
-  ptrdiff_t fragi;
-  int       i;
-  _xfrag0>>=1;
-  fragi=_yfrag0*(ptrdiff_t)_fplanes[1].nhfrags+_xfrag0;
-  for(i=0;i<2;i++){
-    _mb_map[1][i<<1]=fragi+_fplanes[1].froffset;
-    _mb_map[2][i<<1]=fragi+_fplanes[2].froffset;
-    fragi+=_fplanes[1].nhfrags;
-  }
-}
-
-/*Fills in the chroma plane fragment maps for a macro block.
-  This version is for use with no chroma decimation (4:4:4).
-  This uses the already filled-in luma plane values.
-  _mb_map:  The macro block map to fill.
-  _fplanes: The descriptions of the fragment planes.*/
-static void oc_mb_fill_cmapping11(oc_mb_map_plane _mb_map[3],
- const oc_fragment_plane _fplanes[3]){
-  int k;
-  for(k=0;k<4;k++){
-    _mb_map[1][k]=_mb_map[0][k]+_fplanes[1].froffset;
-    _mb_map[2][k]=_mb_map[0][k]+_fplanes[2].froffset;
-  }
-}
-
-/*The function type used to fill in the chroma plane fragment maps for a
-   macro block.
-  _mb_map:  The macro block map to fill.
-  _fplanes: The descriptions of the fragment planes.
-  _xfrag0:  The X location of the upper-left hand fragment in the luma plane.
-  _yfrag0:  The Y location of the upper-left hand fragment in the luma plane.*/
-typedef void (*oc_mb_fill_cmapping_func)(oc_mb_map_plane _mb_map[3],
- const oc_fragment_plane _fplanes[3],int _xfrag0,int _yfrag0);
-
-/*A table of functions used to fill in the chroma plane fragment maps for a
-   macro block for each type of chrominance decimation.*/
-static const oc_mb_fill_cmapping_func OC_MB_FILL_CMAPPING_TABLE[4]={
-  oc_mb_fill_cmapping00,
-  oc_mb_fill_cmapping01,
-  oc_mb_fill_cmapping10,
-  (oc_mb_fill_cmapping_func)oc_mb_fill_cmapping11
-};
-
-/*Fills in the mapping from macro blocks to their corresponding fragment
-   numbers in each plane.
-  _mb_maps:   The list of macro block maps.
-  _mb_modes:  The list of macro block modes; macro blocks completely outside
-               the coded region are marked invalid.
-  _fplanes:   The descriptions of the fragment planes.
-  _pixel_fmt: The chroma decimation type.*/
-static void oc_mb_create_mapping(oc_mb_map _mb_maps[],
- signed char _mb_modes[],const oc_fragment_plane _fplanes[3],int _pixel_fmt){
-  oc_mb_fill_cmapping_func  mb_fill_cmapping;
-  unsigned                  sbi;
-  int                       y;
-  mb_fill_cmapping=OC_MB_FILL_CMAPPING_TABLE[_pixel_fmt];
-  /*Loop through the luma plane super blocks.*/
-  for(sbi=y=0;y<_fplanes[0].nvfrags;y+=4){
-    int x;
-    for(x=0;x<_fplanes[0].nhfrags;x+=4,sbi++){
-      int ymb;
-      /*Loop through the macro blocks in each super block in display order.*/
-      for(ymb=0;ymb<2;ymb++){
-        int xmb;
-        for(xmb=0;xmb<2;xmb++){
-          unsigned mbi;
-          int      mbx;
-          int      mby;
-          mbi=sbi<<2|OC_MB_MAP[ymb][xmb];
-          mbx=x|xmb<<1;
-          mby=y|ymb<<1;
-          /*Initialize fragment indices to -1.*/
-          memset(_mb_maps[mbi],0xFF,sizeof(_mb_maps[mbi]));
-          /*Make sure this macro block is within the encoded region.*/
-          if(mbx>=_fplanes[0].nhfrags||mby>=_fplanes[0].nvfrags){
-            _mb_modes[mbi]=OC_MODE_INVALID;
-            continue;
-          }
-          /*Fill in the fragment indices for the luma plane.*/
-          oc_mb_fill_ymapping(_mb_maps[mbi],_fplanes,mbx,mby);
-          /*Fill in the fragment indices for the chroma planes.*/
-          (*mb_fill_cmapping)(_mb_maps[mbi],_fplanes,mbx,mby);
-        }
-      }
-    }
-  }
-}
-
-/*Marks the fragments which fall all or partially outside the displayable
-   region of the frame.
-  _state: The Theora state containing the fragments to be marked.*/
-static void oc_state_border_init(oc_theora_state *_state){
-  oc_fragment       *frag;
-  oc_fragment       *yfrag_end;
-  oc_fragment       *xfrag_end;
-  oc_fragment_plane *fplane;
-  int                crop_x0;
-  int                crop_y0;
-  int                crop_xf;
-  int                crop_yf;
-  int                pli;
-  int                y;
-  int                x;
-  /*The method we use here is slow, but the code is dead simple and handles
-     all the special cases easily.
-    We only ever need to do it once.*/
-  /*Loop through the fragments, marking those completely outside the
-     displayable region and constructing a border mask for those that straddle
-     the border.*/
-  _state->nborders=0;
-  yfrag_end=frag=_state->frags;
-  for(pli=0;pli<3;pli++){
-    fplane=_state->fplanes+pli;
-    /*Set up the cropping rectangle for this plane.*/
-    crop_x0=_state->info.pic_x;
-    crop_xf=_state->info.pic_x+_state->info.pic_width;
-    crop_y0=_state->info.pic_y;
-    crop_yf=_state->info.pic_y+_state->info.pic_height;
-    if(pli>0){
-      if(!(_state->info.pixel_fmt&1)){
-        crop_x0=crop_x0>>1;
-        crop_xf=crop_xf+1>>1;
-      }
-      if(!(_state->info.pixel_fmt&2)){
-        crop_y0=crop_y0>>1;
-        crop_yf=crop_yf+1>>1;
-      }
-    }
-    y=0;
-    for(yfrag_end+=fplane->nfrags;frag<yfrag_end;y+=8){
-      x=0;
-      for(xfrag_end=frag+fplane->nhfrags;frag<xfrag_end;frag++,x+=8){
-        /*First check to see if this fragment is completely outside the
-           displayable region.*/
-        /*Note the special checks for an empty cropping rectangle.
-          This guarantees that if we count a fragment as straddling the
-           border below, at least one pixel in the fragment will be inside
-           the displayable region.*/
-        if(x+8<=crop_x0||crop_xf<=x||y+8<=crop_y0||crop_yf<=y||
-         crop_x0>=crop_xf||crop_y0>=crop_yf){
-          frag->invalid=1;
-        }
-        /*Otherwise, check to see if it straddles the border.*/
-        else if(x<crop_x0&&crop_x0<x+8||x<crop_xf&&crop_xf<x+8||
-         y<crop_y0&&crop_y0<y+8||y<crop_yf&&crop_yf<y+8){
-          ogg_int64_t mask;
-          int         npixels;
-          int         i;
-          mask=npixels=0;
-          for(i=0;i<8;i++){
-            int j;
-            for(j=0;j<8;j++){
-              if(x+j>=crop_x0&&x+j<crop_xf&&y+i>=crop_y0&&y+i<crop_yf){
-                mask|=(ogg_int64_t)1<<(i<<3|j);
-                npixels++;
-              }
-            }
-          }
-          /*Search the fragment array for border info with the same pattern.
-            In general, there will be at most 8 different patterns (per
-             plane).*/
-          for(i=0;;i++){
-            if(i>=_state->nborders){
-              _state->nborders++;
-              _state->borders[i].mask=mask;
-              _state->borders[i].npixels=npixels;
-            }
-            else if(_state->borders[i].mask!=mask)continue;
-            frag->borderi=i;
-            break;
-          }
-        }
-        else frag->borderi=-1;
-      }
-    }
-  }
-}
-
-static int oc_state_frarray_init(oc_theora_state *_state){
-  int       yhfrags;
-  int       yvfrags;
-  int       chfrags;
-  int       cvfrags;
-  ptrdiff_t yfrags;
-  ptrdiff_t cfrags;
-  ptrdiff_t nfrags;
-  unsigned  yhsbs;
-  unsigned  yvsbs;
-  unsigned  chsbs;
-  unsigned  cvsbs;
-  unsigned  ysbs;
-  unsigned  csbs;
-  unsigned  nsbs;
-  size_t    nmbs;
-  int       hdec;
-  int       vdec;
-  int       pli;
-  /*Figure out the number of fragments in each plane.*/
-  /*These parameters have already been validated to be multiples of 16.*/
-  yhfrags=_state->info.frame_width>>3;
-  yvfrags=_state->info.frame_height>>3;
-  hdec=!(_state->info.pixel_fmt&1);
-  vdec=!(_state->info.pixel_fmt&2);
-  chfrags=yhfrags+hdec>>hdec;
-  cvfrags=yvfrags+vdec>>vdec;
-  yfrags=yhfrags*(ptrdiff_t)yvfrags;
-  cfrags=chfrags*(ptrdiff_t)cvfrags;
-  nfrags=yfrags+2*cfrags;
-  /*Figure out the number of super blocks in each plane.*/
-  yhsbs=yhfrags+3>>2;
-  yvsbs=yvfrags+3>>2;
-  chsbs=chfrags+3>>2;
-  cvsbs=cvfrags+3>>2;
-  ysbs=yhsbs*yvsbs;
-  csbs=chsbs*cvsbs;
-  nsbs=ysbs+2*csbs;
-  nmbs=(size_t)ysbs<<2;
-  /*Check for overflow.
-    We support the ridiculous upper limits of the specification (1048560 by
-     1048560, or 3 TB frames) if the target architecture has 64-bit pointers,
-     but for those with 32-bit pointers (or smaller!) we have to check.
-    If the caller wants to prevent denial-of-service by imposing a more
-     reasonable upper limit on the size of attempted allocations, they must do
-     so themselves; we have no platform independent way to determine how much
-     system memory there is nor an application-independent way to decide what a
-     "reasonable" allocation is.*/
-  if(yfrags/yhfrags!=yvfrags||2*cfrags<cfrags||nfrags<yfrags||
-   ysbs/yhsbs!=yvsbs||2*csbs<csbs||nsbs<ysbs||nmbs>>2!=ysbs){
-    return TH_EIMPL;
-  }
-  /*Initialize the fragment array.*/
-  _state->fplanes[0].nhfrags=yhfrags;
-  _state->fplanes[0].nvfrags=yvfrags;
-  _state->fplanes[0].froffset=0;
-  _state->fplanes[0].nfrags=yfrags;
-  _state->fplanes[0].nhsbs=yhsbs;
-  _state->fplanes[0].nvsbs=yvsbs;
-  _state->fplanes[0].sboffset=0;
-  _state->fplanes[0].nsbs=ysbs;
-  _state->fplanes[1].nhfrags=_state->fplanes[2].nhfrags=chfrags;
-  _state->fplanes[1].nvfrags=_state->fplanes[2].nvfrags=cvfrags;
-  _state->fplanes[1].froffset=yfrags;
-  _state->fplanes[2].froffset=yfrags+cfrags;
-  _state->fplanes[1].nfrags=_state->fplanes[2].nfrags=cfrags;
-  _state->fplanes[1].nhsbs=_state->fplanes[2].nhsbs=chsbs;
-  _state->fplanes[1].nvsbs=_state->fplanes[2].nvsbs=cvsbs;
-  _state->fplanes[1].sboffset=ysbs;
-  _state->fplanes[2].sboffset=ysbs+csbs;
-  _state->fplanes[1].nsbs=_state->fplanes[2].nsbs=csbs;
-  _state->nfrags=nfrags;
-  _state->frags=_ogg_calloc(nfrags,sizeof(*_state->frags));
-  _state->frag_mvs=_ogg_malloc(nfrags*sizeof(*_state->frag_mvs));
-  _state->nsbs=nsbs;
-  _state->sb_maps=_ogg_malloc(nsbs*sizeof(*_state->sb_maps));
-  _state->sb_flags=_ogg_calloc(nsbs,sizeof(*_state->sb_flags));
-  _state->nhmbs=yhsbs<<1;
-  _state->nvmbs=yvsbs<<1;
-  _state->nmbs=nmbs;
-  _state->mb_maps=_ogg_calloc(nmbs,sizeof(*_state->mb_maps));
-  _state->mb_modes=_ogg_calloc(nmbs,sizeof(*_state->mb_modes));
-  _state->coded_fragis=_ogg_malloc(nfrags*sizeof(*_state->coded_fragis));
-  if(_state->frags==NULL||_state->frag_mvs==NULL||_state->sb_maps==NULL||
-   _state->sb_flags==NULL||_state->mb_maps==NULL||_state->mb_modes==NULL||
-   _state->coded_fragis==NULL){
-    return TH_EFAULT;
-  }
-  /*Create the mapping from super blocks to fragments.*/
-  for(pli=0;pli<3;pli++){
-    oc_fragment_plane *fplane;
-    fplane=_state->fplanes+pli;
-    oc_sb_create_plane_mapping(_state->sb_maps+fplane->sboffset,
-     _state->sb_flags+fplane->sboffset,fplane->froffset,
-     fplane->nhfrags,fplane->nvfrags);
-  }
-  /*Create the mapping from macro blocks to fragments.*/
-  oc_mb_create_mapping(_state->mb_maps,_state->mb_modes,
-   _state->fplanes,_state->info.pixel_fmt);
-  /*Initialize the invalid and borderi fields of each fragment.*/
-  oc_state_border_init(_state);
-  return 0;
-}
-
-static void oc_state_frarray_clear(oc_theora_state *_state){
-  _ogg_free(_state->coded_fragis);
-  _ogg_free(_state->mb_modes);
-  _ogg_free(_state->mb_maps);
-  _ogg_free(_state->sb_flags);
-  _ogg_free(_state->sb_maps);
-  _ogg_free(_state->frag_mvs);
-  _ogg_free(_state->frags);
-}
-
-
-/*Initializes the buffers used for reconstructed frames.
-  These buffers are padded with 16 extra pixels on each side, to allow
-   unrestricted motion vectors without special casing the boundary.
-  If chroma is decimated in either direction, the padding is reduced by a
-   factor of 2 on the appropriate sides.
-  _nrefs: The number of reference buffers to init; must be 3 or 4.*/
-static int oc_state_ref_bufs_init(oc_theora_state *_state,int _nrefs){
-  th_info       *info;
-  unsigned char *ref_frame_data;
-  size_t         ref_frame_data_sz;
-  size_t         ref_frame_sz;
-  size_t         yplane_sz;
-  size_t         cplane_sz;
-  int            yhstride;
-  int            yheight;
-  int            chstride;
-  int            cheight;
-  ptrdiff_t      yoffset;
-  ptrdiff_t      coffset;
-  ptrdiff_t     *frag_buf_offs;
-  ptrdiff_t      fragi;
-  int            hdec;
-  int            vdec;
-  int            rfi;
-  int            pli;
-  if(_nrefs<3||_nrefs>4)return TH_EINVAL;
-  info=&_state->info;
-  /*Compute the image buffer parameters for each plane.*/
-  hdec=!(info->pixel_fmt&1);
-  vdec=!(info->pixel_fmt&2);
-  yhstride=info->frame_width+2*OC_UMV_PADDING;
-  yheight=info->frame_height+2*OC_UMV_PADDING;
-  chstride=yhstride>>hdec;
-  cheight=yheight>>vdec;
-  yplane_sz=yhstride*(size_t)yheight;
-  cplane_sz=chstride*(size_t)cheight;
-  yoffset=OC_UMV_PADDING+OC_UMV_PADDING*(ptrdiff_t)yhstride;
-  coffset=(OC_UMV_PADDING>>hdec)+(OC_UMV_PADDING>>vdec)*(ptrdiff_t)chstride;
-  ref_frame_sz=yplane_sz+2*cplane_sz;
-  ref_frame_data_sz=_nrefs*ref_frame_sz;
-  /*Check for overflow.
-    The same caveats apply as for oc_state_frarray_init().*/
-  if(yplane_sz/yhstride!=yheight||2*cplane_sz<cplane_sz||
-   ref_frame_sz<yplane_sz||ref_frame_data_sz/_nrefs!=ref_frame_sz){
-    return TH_EIMPL;
-  }
-  ref_frame_data=_ogg_malloc(ref_frame_data_sz);
-  frag_buf_offs=_state->frag_buf_offs=
-   _ogg_malloc(_state->nfrags*sizeof(*frag_buf_offs));
-  if(ref_frame_data==NULL||frag_buf_offs==NULL){
-    _ogg_free(frag_buf_offs);
-    _ogg_free(ref_frame_data);
-    return TH_EFAULT;
-  }
-  /*Set up the width, height and stride for the image buffers.*/
-  _state->ref_frame_bufs[0][0].width=info->frame_width;
-  _state->ref_frame_bufs[0][0].height=info->frame_height;
-  _state->ref_frame_bufs[0][0].stride=yhstride;
-  _state->ref_frame_bufs[0][1].width=_state->ref_frame_bufs[0][2].width=
-   info->frame_width>>hdec;
-  _state->ref_frame_bufs[0][1].height=_state->ref_frame_bufs[0][2].height=
-   info->frame_height>>vdec;
-  _state->ref_frame_bufs[0][1].stride=_state->ref_frame_bufs[0][2].stride=
-   chstride;
-  for(rfi=1;rfi<_nrefs;rfi++){
-    memcpy(_state->ref_frame_bufs[rfi],_state->ref_frame_bufs[0],
-     sizeof(_state->ref_frame_bufs[0]));
-  }
-  /*Set up the data pointers for the image buffers.*/
-  for(rfi=0;rfi<_nrefs;rfi++){
-    _state->ref_frame_data[rfi]=ref_frame_data;
-    _state->ref_frame_bufs[rfi][0].data=ref_frame_data+yoffset;
-    ref_frame_data+=yplane_sz;
-    _state->ref_frame_bufs[rfi][1].data=ref_frame_data+coffset;
-    ref_frame_data+=cplane_sz;
-    _state->ref_frame_bufs[rfi][2].data=ref_frame_data+coffset;
-    ref_frame_data+=cplane_sz;
-    /*Flip the buffer upside down.
-      This allows us to decode Theora's bottom-up frames in their natural
-       order, yet return a top-down buffer with a positive stride to the user.*/
-    oc_ycbcr_buffer_flip(_state->ref_frame_bufs[rfi],
-     _state->ref_frame_bufs[rfi]);
-  }
-  _state->ref_ystride[0]=-yhstride;
-  _state->ref_ystride[1]=_state->ref_ystride[2]=-chstride;
-  /*Initialize the fragment buffer offsets.*/
-  ref_frame_data=_state->ref_frame_data[0];
-  fragi=0;
-  for(pli=0;pli<3;pli++){
-    th_img_plane      *iplane;
-    oc_fragment_plane *fplane;
-    unsigned char     *vpix;
-    ptrdiff_t          stride;
-    ptrdiff_t          vfragi_end;
-    int                nhfrags;
-    iplane=_state->ref_frame_bufs[0]+pli;
-    fplane=_state->fplanes+pli;
-    vpix=iplane->data;
-    vfragi_end=fplane->froffset+fplane->nfrags;
-    nhfrags=fplane->nhfrags;
-    stride=iplane->stride;
-    while(fragi<vfragi_end){
-      ptrdiff_t      hfragi_end;
-      unsigned char *hpix;
-      hpix=vpix;
-      for(hfragi_end=fragi+nhfrags;fragi<hfragi_end;fragi++){
-        frag_buf_offs[fragi]=hpix-ref_frame_data;
-        hpix+=8;
-      }
-      vpix+=stride<<3;
-    }
-  }
-  /*Initialize the reference frame indices.*/
-  _state->ref_frame_idx[OC_FRAME_GOLD]=
-   _state->ref_frame_idx[OC_FRAME_PREV]=
-   _state->ref_frame_idx[OC_FRAME_SELF]=-1;
-  _state->ref_frame_idx[OC_FRAME_IO]=_nrefs>3?3:-1;
-  return 0;
-}
-
-static void oc_state_ref_bufs_clear(oc_theora_state *_state){
-  _ogg_free(_state->frag_buf_offs);
-  _ogg_free(_state->ref_frame_data[0]);
-}
-
-
-void oc_state_vtable_init_c(oc_theora_state *_state){
-  _state->opt_vtable.frag_copy=oc_frag_copy_c;
-  _state->opt_vtable.frag_recon_intra=oc_frag_recon_intra_c;
-  _state->opt_vtable.frag_recon_inter=oc_frag_recon_inter_c;
-  _state->opt_vtable.frag_recon_inter2=oc_frag_recon_inter2_c;
-  _state->opt_vtable.idct8x8=oc_idct8x8_c;
-  _state->opt_vtable.state_frag_recon=oc_state_frag_recon_c;
-  _state->opt_vtable.state_frag_copy_list=oc_state_frag_copy_list_c;
-  _state->opt_vtable.state_loop_filter_frag_rows=
-   oc_state_loop_filter_frag_rows_c;
-  _state->opt_vtable.restore_fpu=oc_restore_fpu_c;
-  _state->opt_data.dct_fzig_zag=OC_FZIG_ZAG;
-}
-
-/*Initialize the accelerated function pointers.*/
-void oc_state_vtable_init(oc_theora_state *_state){
-#if defined(OC_X86_ASM)
-  oc_state_vtable_init_x86(_state);
-#else
-  oc_state_vtable_init_c(_state);
-#endif
-}
-
-
-int oc_state_init(oc_theora_state *_state,const th_info *_info,int _nrefs){
-  int ret;
-  /*First validate the parameters.*/
-  if(_info==NULL)return TH_EFAULT;
-  /*The width and height of the encoded frame must be multiples of 16.
-    They must also, when divided by 16, fit into a 16-bit unsigned integer.
-    The displayable frame offset coordinates must fit into an 8-bit unsigned
-     integer.
-    Note that the offset Y in the API is specified on the opposite side from
-     how it is specified in the bitstream, because the Y axis is flipped in
-     the bitstream.
-    The displayable frame must fit inside the encoded frame.
-    The color space must be one known by the encoder.*/
-  if((_info->frame_width&0xF)||(_info->frame_height&0xF)||
-   _info->frame_width<=0||_info->frame_width>=0x100000||
-   _info->frame_height<=0||_info->frame_height>=0x100000||
-   _info->pic_x+_info->pic_width>_info->frame_width||
-   _info->pic_y+_info->pic_height>_info->frame_height||
-   _info->pic_x>255||_info->frame_height-_info->pic_height-_info->pic_y>255||
-   /*Note: the following <0 comparisons may generate spurious warnings on
-      platforms where enums are unsigned.
-     We could cast them to unsigned and just use the following >= comparison,
-      but there are a number of compilers which will mis-optimize this.
-     It's better to live with the spurious warnings.*/
-   _info->colorspace<0||_info->colorspace>=TH_CS_NSPACES||
-   _info->pixel_fmt<0||_info->pixel_fmt>=TH_PF_NFORMATS){
-    return TH_EINVAL;
-  }
-  memset(_state,0,sizeof(*_state));
-  memcpy(&_state->info,_info,sizeof(*_info));
-  /*Invert the sense of pic_y to match Theora's right-handed coordinate
-     system.*/
-  _state->info.pic_y=_info->frame_height-_info->pic_height-_info->pic_y;
-  _state->frame_type=OC_UNKWN_FRAME;
-  oc_state_vtable_init(_state);
-  ret=oc_state_frarray_init(_state);
-  if(ret>=0)ret=oc_state_ref_bufs_init(_state,_nrefs);
-  if(ret<0){
-    oc_state_frarray_clear(_state);
-    return ret;
-  }
-  /*If the keyframe_granule_shift is out of range, use the maximum allowable
-     value.*/
-  if(_info->keyframe_granule_shift<0||_info->keyframe_granule_shift>31){
-    _state->info.keyframe_granule_shift=31;
-  }
-  _state->keyframe_num=0;
-  _state->curframe_num=-1;
-  /*3.2.0 streams mark the frame index instead of the frame count.
-    This was changed with stream version 3.2.1 to conform to other Ogg
-     codecs.
-    We add an extra bias when computing granule positions for new streams.*/
-  _state->granpos_bias=TH_VERSION_CHECK(_info,3,2,1);
-  return 0;
-}
-
-void oc_state_clear(oc_theora_state *_state){
-  oc_state_ref_bufs_clear(_state);
-  oc_state_frarray_clear(_state);
-}
-
-
-/*Duplicates the pixels on the border of the image plane out into the
-   surrounding padding for use by unrestricted motion vectors.
-  This function only adds the left and right borders, and only for the fragment
-   rows specified.
-  _refi: The index of the reference buffer to pad.
-  _pli:  The color plane.
-  _y0:   The Y coordinate of the first row to pad.
-  _yend: The Y coordinate of the row to stop padding at.*/
-void oc_state_borders_fill_rows(oc_theora_state *_state,int _refi,int _pli,
- int _y0,int _yend){
-  th_img_plane  *iplane;
-  unsigned char *apix;
-  unsigned char *bpix;
-  unsigned char *epix;
-  int            stride;
-  int            hpadding;
-  hpadding=OC_UMV_PADDING>>(_pli!=0&&!(_state->info.pixel_fmt&1));
-  iplane=_state->ref_frame_bufs[_refi]+_pli;
-  stride=iplane->stride;
-  apix=iplane->data+_y0*(ptrdiff_t)stride;
-  bpix=apix+iplane->width-1;
-  epix=iplane->data+_yend*(ptrdiff_t)stride;
-  /*Note the use of != instead of <, which allows the stride to be negative.*/
-  while(apix!=epix){
-    memset(apix-hpadding,apix[0],hpadding);
-    memset(bpix+1,bpix[0],hpadding);
-    apix+=stride;
-    bpix+=stride;
-  }
-}
-
-/*Duplicates the pixels on the border of the image plane out into the
-   surrounding padding for use by unrestricted motion vectors.
-  This function only adds the top and bottom borders, and must be called after
-   the left and right borders are added.
-  _refi:      The index of the reference buffer to pad.
-  _pli:       The color plane.*/
-void oc_state_borders_fill_caps(oc_theora_state *_state,int _refi,int _pli){
-  th_img_plane  *iplane;
-  unsigned char *apix;
-  unsigned char *bpix;
-  unsigned char *epix;
-  int            stride;
-  int            hpadding;
-  int            vpadding;
-  int            fullw;
-  hpadding=OC_UMV_PADDING>>(_pli!=0&&!(_state->info.pixel_fmt&1));
-  vpadding=OC_UMV_PADDING>>(_pli!=0&&!(_state->info.pixel_fmt&2));
-  iplane=_state->ref_frame_bufs[_refi]+_pli;
-  stride=iplane->stride;
-  fullw=iplane->width+(hpadding<<1);
-  apix=iplane->data-hpadding;
-  bpix=iplane->data+(iplane->height-1)*(ptrdiff_t)stride-hpadding;
-  epix=apix-stride*(ptrdiff_t)vpadding;
-  while(apix!=epix){
-    memcpy(apix-stride,apix,fullw);
-    memcpy(bpix+stride,bpix,fullw);
-    apix-=stride;
-    bpix+=stride;
-  }
-}
-
-/*Duplicates the pixels on the border of the given reference image out into
-   the surrounding padding for use by unrestricted motion vectors.
-  _state: The context containing the reference buffers.
-  _refi:  The index of the reference buffer to pad.*/
-void oc_state_borders_fill(oc_theora_state *_state,int _refi){
-  int pli;
-  for(pli=0;pli<3;pli++){
-    oc_state_borders_fill_rows(_state,_refi,pli,0,
-     _state->ref_frame_bufs[_refi][pli].height);
-    oc_state_borders_fill_caps(_state,_refi,pli);
-  }
-}
-
-/*Determines the offsets in an image buffer to use for motion compensation.
-  _state:   The Theora state the offsets are to be computed with.
-  _offsets: Returns the offset for the buffer(s).
-            _offsets[0] is always set.
-            _offsets[1] is set if the motion vector has non-zero fractional
-             components.
-  _pli:     The color plane index.
-  _dx:      The X component of the motion vector.
-  _dy:      The Y component of the motion vector.
-  Return: The number of offsets returned: 1 or 2.*/
-int oc_state_get_mv_offsets(const oc_theora_state *_state,int _offsets[2],
- int _pli,int _dx,int _dy){
-  /*Here is a brief description of how Theora handles motion vectors:
-    Motion vector components are specified to half-pixel accuracy in
-     undecimated directions of each plane, and quarter-pixel accuracy in
-     decimated directions.
-    Integer parts are extracted by dividing (not shifting) by the
-     appropriate amount, with truncation towards zero.
-    These integer values are used to calculate the first offset.
-
-    If either of the fractional parts are non-zero, then a second offset is
-     computed.
-    No third or fourth offsets are computed, even if both components have
-     non-zero fractional parts.
-    The second offset is computed by dividing (not shifting) by the
-     appropriate amount, always truncating _away_ from zero.*/
-#if 0
-  /*This version of the code doesn't use any tables, but is slower.*/
-  int ystride;
-  int xprec;
-  int yprec;
-  int xfrac;
-  int yfrac;
-  int offs;
-  ystride=_state->ref_ystride[_pli];
-  /*These two variables decide whether we are in half- or quarter-pixel
-     precision in each component.*/
-  xprec=1+(_pli!=0&&!(_state->info.pixel_fmt&1));
-  yprec=1+(_pli!=0&&!(_state->info.pixel_fmt&2));
-  /*These two variables are either 0 if all the fractional bits are zero or -1
-     if any of them are non-zero.*/
-  xfrac=OC_SIGNMASK(-(_dx&(xprec|1)));
-  yfrac=OC_SIGNMASK(-(_dy&(yprec|1)));
-  offs=(_dx>>xprec)+(_dy>>yprec)*ystride;
-  if(xfrac||yfrac){
-    int xmask;
-    int ymask;
-    xmask=OC_SIGNMASK(_dx);
-    ymask=OC_SIGNMASK(_dy);
-    yfrac&=ystride;
-    _offsets[0]=offs-(xfrac&xmask)+(yfrac&ymask);
-    _offsets[1]=offs-(xfrac&~xmask)+(yfrac&~ymask);
-    return 2;
-  }
-  else{
-    _offsets[0]=offs;
-    return 1;
-  }
-#else
-  /*Using tables simplifies the code, and there's enough arithmetic to hide the
-     latencies of the memory references.*/
-  static const signed char OC_MVMAP[2][64]={
-    {
-          -15,-15,-14,-14,-13,-13,-12,-12,-11,-11,-10,-10, -9, -9, -8,
-       -8, -7, -7, -6, -6, -5, -5, -4, -4, -3, -3, -2, -2, -1, -1,  0,
-        0,  0,  1,  1,  2,  2,  3,  3,  4,  4,  5,  5,  6,  6,  7,  7,
-        8,  8,  9,  9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15, 15
-    },
-    {
-           -7, -7, -7, -7, -6, -6, -6, -6, -5, -5, -5, -5, -4, -4, -4,
-       -4, -3, -3, -3, -3, -2, -2, -2, -2, -1, -1, -1, -1,  0,  0,  0,
-        0,  0,  0,  0,  1,  1,  1,  1,  2,  2,  2,  2,  3,  3,  3,  3,
-        4,  4,  4,  4,  5,  5,  5,  5,  6,  6,  6,  6,  7,  7,  7,  7
-    }
-  };
-  static const signed char OC_MVMAP2[2][64]={
-    {
-        -1, 0,-1,  0,-1, 0,-1,  0,-1, 0,-1,  0,-1, 0,-1,
-      0,-1, 0,-1,  0,-1, 0,-1,  0,-1, 0,-1,  0,-1, 0,-1,
-      0, 1, 0, 1,  0, 1, 0, 1,  0, 1, 0, 1,  0, 1, 0, 1,
-      0, 1, 0, 1,  0, 1, 0, 1,  0, 1, 0, 1,  0, 1, 0, 1
-    },
-    {
-        -1,-1,-1,  0,-1,-1,-1,  0,-1,-1,-1,  0,-1,-1,-1,
-      0,-1,-1,-1,  0,-1,-1,-1,  0,-1,-1,-1,  0,-1,-1,-1,
-      0, 1, 1, 1,  0, 1, 1, 1,  0, 1, 1, 1,  0, 1, 1, 1,
-      0, 1, 1, 1,  0, 1, 1, 1,  0, 1, 1, 1,  0, 1, 1, 1
-    }
-  };
-  int ystride;
-  int qpx;
-  int qpy;
-  int mx;
-  int my;
-  int mx2;
-  int my2;
-  int offs;
-  ystride=_state->ref_ystride[_pli];
-  qpy=_pli!=0&&!(_state->info.pixel_fmt&2);
-  my=OC_MVMAP[qpy][_dy+31];
-  my2=OC_MVMAP2[qpy][_dy+31];
-  qpx=_pli!=0&&!(_state->info.pixel_fmt&1);
-  mx=OC_MVMAP[qpx][_dx+31];
-  mx2=OC_MVMAP2[qpx][_dx+31];
-  offs=my*ystride+mx;
-  if(mx2||my2){
-    _offsets[1]=offs+my2*ystride+mx2;
-    _offsets[0]=offs;
-    return 2;
-  }
-  _offsets[0]=offs;
-  return 1;
-#endif
-}
-
-void oc_state_frag_recon(const oc_theora_state *_state,ptrdiff_t _fragi,
- int _pli,ogg_int16_t _dct_coeffs[64],int _last_zzi,ogg_uint16_t _dc_quant){
-  _state->opt_vtable.state_frag_recon(_state,_fragi,_pli,_dct_coeffs,
-   _last_zzi,_dc_quant);
-}
-
-void oc_state_frag_recon_c(const oc_theora_state *_state,ptrdiff_t _fragi,
- int _pli,ogg_int16_t _dct_coeffs[64],int _last_zzi,ogg_uint16_t _dc_quant){
-  unsigned char *dst;
-  ptrdiff_t      frag_buf_off;
-  int            ystride;
-  int            mb_mode;
-  /*Apply the inverse transform.*/
-  /*Special case only having a DC component.*/
-  if(_last_zzi<2){
-    ogg_int16_t p;
-    int         ci;
-    /*We round this dequant product (and not any of the others) because there's
-       no iDCT rounding.*/
-    p=(ogg_int16_t)(_dct_coeffs[0]*(ogg_int32_t)_dc_quant+15>>5);
-    /*LOOP VECTORIZES.*/
-    for(ci=0;ci<64;ci++)_dct_coeffs[ci]=p;
-  }
-  else{
-    /*First, dequantize the DC coefficient.*/
-    _dct_coeffs[0]=(ogg_int16_t)(_dct_coeffs[0]*(int)_dc_quant);
-    oc_idct8x8(_state,_dct_coeffs,_last_zzi);
-  }
-  /*Fill in the target buffer.*/
-  frag_buf_off=_state->frag_buf_offs[_fragi];
-  mb_mode=_state->frags[_fragi].mb_mode;
-  ystride=_state->ref_ystride[_pli];
-  dst=_state->ref_frame_data[_state->ref_frame_idx[OC_FRAME_SELF]]+frag_buf_off;
-  if(mb_mode==OC_MODE_INTRA)oc_frag_recon_intra(_state,dst,ystride,_dct_coeffs);
-  else{
-    const unsigned char *ref;
-    int                  mvoffsets[2];
-    ref=
-     _state->ref_frame_data[_state->ref_frame_idx[OC_FRAME_FOR_MODE(mb_mode)]]
-     +frag_buf_off;
-    if(oc_state_get_mv_offsets(_state,mvoffsets,_pli,
-     _state->frag_mvs[_fragi][0],_state->frag_mvs[_fragi][1])>1){
-      oc_frag_recon_inter2(_state,
-       dst,ref+mvoffsets[0],ref+mvoffsets[1],ystride,_dct_coeffs);
-    }
-    else oc_frag_recon_inter(_state,dst,ref+mvoffsets[0],ystride,_dct_coeffs);
-  }
-}
-
-/*Copies the fragments specified by the lists of fragment indices from one
-   frame to another.
-  _fragis:    A pointer to a list of fragment indices.
-  _nfragis:   The number of fragment indices to copy.
-  _dst_frame: The reference frame to copy to.
-  _src_frame: The reference frame to copy from.
-  _pli:       The color plane the fragments lie in.*/
-void oc_state_frag_copy_list(const oc_theora_state *_state,
- const ptrdiff_t *_fragis,ptrdiff_t _nfragis,
- int _dst_frame,int _src_frame,int _pli){
-  _state->opt_vtable.state_frag_copy_list(_state,_fragis,_nfragis,_dst_frame,
-   _src_frame,_pli);
-}
-
-void oc_state_frag_copy_list_c(const oc_theora_state *_state,
- const ptrdiff_t *_fragis,ptrdiff_t _nfragis,
- int _dst_frame,int _src_frame,int _pli){
-  const ptrdiff_t     *frag_buf_offs;
-  const unsigned char *src_frame_data;
-  unsigned char       *dst_frame_data;
-  ptrdiff_t            fragii;
-  int                  ystride;
-  dst_frame_data=_state->ref_frame_data[_state->ref_frame_idx[_dst_frame]];
-  src_frame_data=_state->ref_frame_data[_state->ref_frame_idx[_src_frame]];
-  ystride=_state->ref_ystride[_pli];
-  frag_buf_offs=_state->frag_buf_offs;
-  for(fragii=0;fragii<_nfragis;fragii++){
-    ptrdiff_t frag_buf_off;
-    frag_buf_off=frag_buf_offs[_fragis[fragii]];
-    oc_frag_copy(_state,dst_frame_data+frag_buf_off,
-     src_frame_data+frag_buf_off,ystride);
-  }
-}
-
-static void loop_filter_h(unsigned char *_pix,int _ystride,int *_bv){
-  int y;
-  _pix-=2;
-  for(y=0;y<8;y++){
-    int f;
-    f=_pix[0]-_pix[3]+3*(_pix[2]-_pix[1]);
-    /*The _bv array is used to compute the function
-      f=OC_CLAMPI(OC_MINI(-_2flimit-f,0),f,OC_MAXI(_2flimit-f,0));
-      where _2flimit=_state->loop_filter_limits[_state->qis[0]]<<1;*/
-    f=*(_bv+(f+4>>3));
-    _pix[1]=OC_CLAMP255(_pix[1]+f);
-    _pix[2]=OC_CLAMP255(_pix[2]-f);
-    _pix+=_ystride;
-  }
-}
-
-static void loop_filter_v(unsigned char *_pix,int _ystride,int *_bv){
-  int x;
-  _pix-=_ystride*2;
-  for(x=0;x<8;x++){
-    int f;
-    f=_pix[x]-_pix[_ystride*3+x]+3*(_pix[_ystride*2+x]-_pix[_ystride+x]);
-    /*The _bv array is used to compute the function
-      f=OC_CLAMPI(OC_MINI(-_2flimit-f,0),f,OC_MAXI(_2flimit-f,0));
-      where _2flimit=_state->loop_filter_limits[_state->qis[0]]<<1;*/
-    f=*(_bv+(f+4>>3));
-    _pix[_ystride+x]=OC_CLAMP255(_pix[_ystride+x]+f);
-    _pix[_ystride*2+x]=OC_CLAMP255(_pix[_ystride*2+x]-f);
-  }
-}
-
-/*Initialize the bounding values array used by the loop filter.
-  _bv: Storage for the array.
-  Return: 0 on success, or a non-zero value if no filtering need be applied.*/
-int oc_state_loop_filter_init(oc_theora_state *_state,int _bv[256]){
-  int flimit;
-  int i;
-  flimit=_state->loop_filter_limits[_state->qis[0]];
-  if(flimit==0)return 1;
-  memset(_bv,0,sizeof(_bv[0])*256);
-  for(i=0;i<flimit;i++){
-    if(127-i-flimit>=0)_bv[127-i-flimit]=i-flimit;
-    _bv[127-i]=-i;
-    _bv[127+i]=i;
-    if(127+i+flimit<256)_bv[127+i+flimit]=flimit-i;
-  }
-  return 0;
-}
-
-/*Apply the loop filter to a given set of fragment rows in the given plane.
-  The filter may be run on the bottom edge, affecting pixels in the next row of
-   fragments, so this row also needs to be available.
-  _bv:        The bounding values array.
-  _refi:      The index of the frame buffer to filter.
-  _pli:       The color plane to filter.
-  _fragy0:    The Y coordinate of the first fragment row to filter.
-  _fragy_end: The Y coordinate of the fragment row to stop filtering at.*/
-void oc_state_loop_filter_frag_rows(const oc_theora_state *_state,int _bv[256],
- int _refi,int _pli,int _fragy0,int _fragy_end){
-  _state->opt_vtable.state_loop_filter_frag_rows(_state,_bv,_refi,_pli,
-   _fragy0,_fragy_end);
-}
-
-void oc_state_loop_filter_frag_rows_c(const oc_theora_state *_state,int *_bv,
- int _refi,int _pli,int _fragy0,int _fragy_end){
-  const oc_fragment_plane *fplane;
-  const oc_fragment       *frags;
-  const ptrdiff_t         *frag_buf_offs;
-  unsigned char           *ref_frame_data;
-  ptrdiff_t                fragi_top;
-  ptrdiff_t                fragi_bot;
-  ptrdiff_t                fragi0;
-  ptrdiff_t                fragi0_end;
-  int                      ystride;
-  int                      nhfrags;
-  _bv+=127;
-  fplane=_state->fplanes+_pli;
-  nhfrags=fplane->nhfrags;
-  fragi_top=fplane->froffset;
-  fragi_bot=fragi_top+fplane->nfrags;
-  fragi0=fragi_top+_fragy0*(ptrdiff_t)nhfrags;
-  fragi0_end=fragi0+(_fragy_end-_fragy0)*(ptrdiff_t)nhfrags;
-  ystride=_state->ref_ystride[_pli];
-  frags=_state->frags;
-  frag_buf_offs=_state->frag_buf_offs;
-  ref_frame_data=_state->ref_frame_data[_refi];
-  /*The following loops are constructed somewhat non-intuitively on purpose.
-    The main idea is: if a block boundary has at least one coded fragment on
-     it, the filter is applied to it.
-    However, the order that the filters are applied in matters, and VP3 chose
-     the somewhat strange ordering used below.*/
-  while(fragi0<fragi0_end){
-    ptrdiff_t fragi;
-    ptrdiff_t fragi_end;
-    fragi=fragi0;
-    fragi_end=fragi+nhfrags;
-    while(fragi<fragi_end){
-      if(frags[fragi].coded){
-        unsigned char *ref;
-        ref=ref_frame_data+frag_buf_offs[fragi];
-        if(fragi>fragi0)loop_filter_h(ref,ystride,_bv);
-        if(fragi0>fragi_top)loop_filter_v(ref,ystride,_bv);
-        if(fragi+1<fragi_end&&!frags[fragi+1].coded){
-          loop_filter_h(ref+8,ystride,_bv);
-        }
-        if(fragi+nhfrags<fragi_bot&&!frags[fragi+nhfrags].coded){
-          loop_filter_v(ref+(ystride<<3),ystride,_bv);
-        }
-      }
-      fragi++;
-    }
-    fragi0+=nhfrags;
-  }
-}
-
-#if defined(OC_DUMP_IMAGES)
-int oc_state_dump_frame(const oc_theora_state *_state,int _frame,
- const char *_suf){
-  /*Dump a PNG of the reconstructed image.*/
-  png_structp    png;
-  png_infop      info;
-  png_bytep     *image;
-  FILE          *fp;
-  char           fname[16];
-  unsigned char *y_row;
-  unsigned char *u_row;
-  unsigned char *v_row;
-  unsigned char *y;
-  unsigned char *u;
-  unsigned char *v;
-  ogg_int64_t    iframe;
-  ogg_int64_t    pframe;
-  int            y_stride;
-  int            u_stride;
-  int            v_stride;
-  int            framei;
-  int            width;
-  int            height;
-  int            imgi;
-  int            imgj;
-  width=_state->info.frame_width;
-  height=_state->info.frame_height;
-  iframe=_state->granpos>>_state->info.keyframe_granule_shift;
-  pframe=_state->granpos-(iframe<<_state->info.keyframe_granule_shift);
-  sprintf(fname,"%08i%s.png",(int)(iframe+pframe),_suf);
-  fp=fopen(fname,"wb");
-  if(fp==NULL)return TH_EFAULT;
-  image=(png_bytep *)oc_malloc_2d(height,6*width,sizeof(**image));
-  if(image==NULL){
-    fclose(fp);
-    return TH_EFAULT;
-  }
-  png=png_create_write_struct(PNG_LIBPNG_VER_STRING,NULL,NULL,NULL);
-  if(png==NULL){
-    oc_free_2d(image);
-    fclose(fp);
-    return TH_EFAULT;
-  }
-  info=png_create_info_struct(png);
-  if(info==NULL){
-    png_destroy_write_struct(&png,NULL);
-    oc_free_2d(image);
-    fclose(fp);
-    return TH_EFAULT;
-  }
-  if(setjmp(png_jmpbuf(png))){
-    png_destroy_write_struct(&png,&info);
-    oc_free_2d(image);
-    fclose(fp);
-    return TH_EFAULT;
-  }
-  framei=_state->ref_frame_idx[_frame];
-  y_row=_state->ref_frame_bufs[framei][0].data;
-  u_row=_state->ref_frame_bufs[framei][1].data;
-  v_row=_state->ref_frame_bufs[framei][2].data;
-  y_stride=_state->ref_frame_bufs[framei][0].stride;
-  u_stride=_state->ref_frame_bufs[framei][1].stride;
-  v_stride=_state->ref_frame_bufs[framei][2].stride;
-  /*Chroma up-sampling is just done with a box filter.
-    This is very likely what will actually be used in practice on a real
-     display, and also removes one more layer to search in for the source of
-     artifacts.
-    As an added bonus, it's dead simple.*/
-  for(imgi=height;imgi-->0;){
-    int dc;
-    y=y_row;
-    u=u_row;
-    v=v_row;
-    for(imgj=0;imgj<6*width;){
-      float    yval;
-      float    uval;
-      float    vval;
-      unsigned rval;
-      unsigned gval;
-      unsigned bval;
-      /*This is intentionally slow and very accurate.*/
-      yval=(*y-16)*(1.0F/219);
-      uval=(*u-128)*(2*(1-0.114F)/224);
-      vval=(*v-128)*(2*(1-0.299F)/224);
-      rval=OC_CLAMPI(0,(int)(65535*(yval+vval)+0.5F),65535);
-      gval=OC_CLAMPI(0,(int)(65535*(
-       yval-uval*(0.114F/0.587F)-vval*(0.299F/0.587F))+0.5F),65535);
-      bval=OC_CLAMPI(0,(int)(65535*(yval+uval)+0.5F),65535);
-      image[imgi][imgj++]=(unsigned char)(rval>>8);
-      image[imgi][imgj++]=(unsigned char)(rval&0xFF);
-      image[imgi][imgj++]=(unsigned char)(gval>>8);
-      image[imgi][imgj++]=(unsigned char)(gval&0xFF);
-      image[imgi][imgj++]=(unsigned char)(bval>>8);
-      image[imgi][imgj++]=(unsigned char)(bval&0xFF);
-      dc=(y-y_row&1)|(_state->info.pixel_fmt&1);
-      y++;
-      u+=dc;
-      v+=dc;
-    }
-    dc=-((height-1-imgi&1)|_state->info.pixel_fmt>>1);
-    y_row+=y_stride;
-    u_row+=dc&u_stride;
-    v_row+=dc&v_stride;
-  }
-  png_init_io(png,fp);
-  png_set_compression_level(png,Z_BEST_COMPRESSION);
-  png_set_IHDR(png,info,width,height,16,PNG_COLOR_TYPE_RGB,
-   PNG_INTERLACE_NONE,PNG_COMPRESSION_TYPE_DEFAULT,PNG_FILTER_TYPE_DEFAULT);
-  switch(_state->info.colorspace){
-    case TH_CS_ITU_REC_470M:{
-      png_set_gAMA(png,info,2.2);
-      png_set_cHRM_fixed(png,info,31006,31616,
-       67000,32000,21000,71000,14000,8000);
-    }break;
-    case TH_CS_ITU_REC_470BG:{
-      png_set_gAMA(png,info,2.67);
-      png_set_cHRM_fixed(png,info,31271,32902,
-       64000,33000,29000,60000,15000,6000);
-    }break;
-    default:break;
-  }
-  png_set_pHYs(png,info,_state->info.aspect_numerator,
-   _state->info.aspect_denominator,0);
-  png_set_rows(png,info,image);
-  png_write_png(png,info,PNG_TRANSFORM_IDENTITY,NULL);
-  png_write_end(png,info);
-  png_destroy_write_struct(&png,&info);
-  oc_free_2d(image);
-  fclose(fp);
-  return 0;
-}
-#endif
-
-
-
-ogg_int64_t th_granule_frame(void *_encdec,ogg_int64_t _granpos){
-  oc_theora_state *state;
-  state=(oc_theora_state *)_encdec;
-  if(_granpos>=0){
-    ogg_int64_t iframe;
-    ogg_int64_t pframe;
-    iframe=_granpos>>state->info.keyframe_granule_shift;
-    pframe=_granpos-(iframe<<state->info.keyframe_granule_shift);
-    /*3.2.0 streams store the frame index in the granule position.
-      3.2.1 and later store the frame count.
-      We return the index, so adjust the value if we have a 3.2.1 or later
-       stream.*/
-    return iframe+pframe-TH_VERSION_CHECK(&state->info,3,2,1);
-  }
-  return -1;
-}
-
-double th_granule_time(void *_encdec,ogg_int64_t _granpos){
-  oc_theora_state *state;
-  state=(oc_theora_state *)_encdec;
-  if(_granpos>=0){
-    return (th_granule_frame(_encdec, _granpos)+1)*(
-     (double)state->info.fps_denominator/state->info.fps_numerator);
-  }
-  return -1;
-}