зеркало из https://github.com/mozilla/gecko-dev.git
83 строки
2.8 KiB
C
83 строки
2.8 KiB
C
/********************************************************************
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* *
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* THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE. *
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* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
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* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
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* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
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* *
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* THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2009 *
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* by the Xiph.Org Foundation and contributors http://www.xiph.org/ *
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* *
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********************************************************************
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function:
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last mod: $Id: fragment.c 17410 2010-09-21 21:53:48Z tterribe $
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********************************************************************/
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#include <string.h>
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#include "internal.h"
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void oc_frag_copy_c(unsigned char *_dst,const unsigned char *_src,int _ystride){
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int i;
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for(i=8;i-->0;){
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memcpy(_dst,_src,8*sizeof(*_dst));
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_dst+=_ystride;
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_src+=_ystride;
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}
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}
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/*Copies the fragments specified by the lists of fragment indices from one
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frame to another.
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_dst_frame: The reference frame to copy to.
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_src_frame: The reference frame to copy from.
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_ystride: The row stride of the reference frames.
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_fragis: A pointer to a list of fragment indices.
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_nfragis: The number of fragment indices to copy.
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_frag_buf_offs: The offsets of fragments in the reference frames.*/
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void oc_frag_copy_list_c(unsigned char *_dst_frame,
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const unsigned char *_src_frame,int _ystride,
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const ptrdiff_t *_fragis,ptrdiff_t _nfragis,const ptrdiff_t *_frag_buf_offs){
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ptrdiff_t fragii;
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for(fragii=0;fragii<_nfragis;fragii++){
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ptrdiff_t frag_buf_off;
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frag_buf_off=_frag_buf_offs[_fragis[fragii]];
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oc_frag_copy_c(_dst_frame+frag_buf_off,
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_src_frame+frag_buf_off,_ystride);
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}
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}
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void oc_frag_recon_intra_c(unsigned char *_dst,int _ystride,
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const ogg_int16_t _residue[64]){
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int i;
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for(i=0;i<8;i++){
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int j;
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for(j=0;j<8;j++)_dst[j]=OC_CLAMP255(_residue[i*8+j]+128);
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_dst+=_ystride;
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}
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}
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void oc_frag_recon_inter_c(unsigned char *_dst,
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const unsigned char *_src,int _ystride,const ogg_int16_t _residue[64]){
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int i;
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for(i=0;i<8;i++){
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int j;
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for(j=0;j<8;j++)_dst[j]=OC_CLAMP255(_residue[i*8+j]+_src[j]);
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_dst+=_ystride;
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_src+=_ystride;
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}
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}
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void oc_frag_recon_inter2_c(unsigned char *_dst,const unsigned char *_src1,
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const unsigned char *_src2,int _ystride,const ogg_int16_t _residue[64]){
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int i;
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for(i=0;i<8;i++){
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int j;
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for(j=0;j<8;j++)_dst[j]=OC_CLAMP255(_residue[i*8+j]+(_src1[j]+_src2[j]>>1));
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_dst+=_ystride;
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_src1+=_ystride;
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_src2+=_ystride;
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}
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}
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void oc_restore_fpu_c(void){}
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