The Tor Browser: media/libtheora/lib/fragment.c@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /********************************************************************

     2  *                                                                  *

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

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

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

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

     7  *                                                                  *

     8  * THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2009                *

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

    10  *                                                                  *

    11  ********************************************************************

    13   function:

    14     last mod: $Id: fragment.c 17410 2010-09-21 21:53:48Z tterribe $

    16  ********************************************************************/

    17 #include <string.h>

    18 #include "internal.h"

    20 void oc_frag_copy_c(unsigned char *_dst,const unsigned char *_src,int _ystride){

    21   int i;

    22   for(i=8;i-->0;){

    23     memcpy(_dst,_src,8*sizeof(*_dst));

    24     _dst+=_ystride;

    25     _src+=_ystride;

    26   }

    27 }

    29 /*Copies the fragments specified by the lists of fragment indices from one

    30    frame to another.

    31   _dst_frame:     The reference frame to copy to.

    32   _src_frame:     The reference frame to copy from.

    33   _ystride:       The row stride of the reference frames.

    34   _fragis:        A pointer to a list of fragment indices.

    35   _nfragis:       The number of fragment indices to copy.

    36   _frag_buf_offs: The offsets of fragments in the reference frames.*/

    37 void oc_frag_copy_list_c(unsigned char *_dst_frame,

    38  const unsigned char *_src_frame,int _ystride,

    39  const ptrdiff_t *_fragis,ptrdiff_t _nfragis,const ptrdiff_t *_frag_buf_offs){

    40   ptrdiff_t fragii;

    41   for(fragii=0;fragii<_nfragis;fragii++){

    42     ptrdiff_t frag_buf_off;

    43     frag_buf_off=_frag_buf_offs[_fragis[fragii]];

    44     oc_frag_copy_c(_dst_frame+frag_buf_off,

    45      _src_frame+frag_buf_off,_ystride);

    46   }

    47 }

    49 void oc_frag_recon_intra_c(unsigned char *_dst,int _ystride,

    50  const ogg_int16_t _residue[64]){

    51   int i;

    52   for(i=0;i<8;i++){

    53     int j;

    54     for(j=0;j<8;j++)_dst[j]=OC_CLAMP255(_residue[i*8+j]+128);

    55     _dst+=_ystride;

    56   }

    57 }

    59 void oc_frag_recon_inter_c(unsigned char *_dst,

    60  const unsigned char *_src,int _ystride,const ogg_int16_t _residue[64]){

    61   int i;

    62   for(i=0;i<8;i++){

    63     int j;

    64     for(j=0;j<8;j++)_dst[j]=OC_CLAMP255(_residue[i*8+j]+_src[j]);

    65     _dst+=_ystride;

    66     _src+=_ystride;

    67   }

    68 }

    70 void oc_frag_recon_inter2_c(unsigned char *_dst,const unsigned char *_src1,

    71  const unsigned char *_src2,int _ystride,const ogg_int16_t _residue[64]){

    72   int i;

    73   for(i=0;i<8;i++){

    74     int j;

    75     for(j=0;j<8;j++)_dst[j]=OC_CLAMP255(_residue[i*8+j]+(_src1[j]+_src2[j]>>1));

    76     _dst+=_ystride;

    77     _src1+=_ystride;

    78     _src2+=_ystride;

    79   }

    80 }

    82 void oc_restore_fpu_c(void){}

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