ffmpeg / libavcodec / sh4 / dsputil_sh4.c @ 5509bffa
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/*
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* sh4 dsputil
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*
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* Copyright (c) 2003 BERO <bero@geocities.co.jp>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "../avcodec.h" |
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#include "../dsputil.h" |
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static void memzero_align8(void *dst,size_t size) |
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{ |
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#if defined(__SH4__) || defined(__SH4_SINGLE__) || defined(__SH4_SINGLE_ONLY__)
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(char*)dst+=size;
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size/=8*4; |
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asm(
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#if defined(__SH4__)
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" fschg\n" //single float mode |
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#endif
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" fldi0 fr0\n"
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" fldi0 fr1\n"
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" fschg\n" // double |
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"1: \n" \
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" dt %1\n"
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" fmov dr0,@-%0\n"
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" fmov dr0,@-%0\n"
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" fmov dr0,@-%0\n"
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" bf.s 1b\n"
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" fmov dr0,@-%0\n"
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#if defined(__SH4_SINGLE__) || defined(__SH4_SINGLE_ONLY__)
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" fschg" //back to single |
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#endif
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: : "r"(dst),"r"(size): "memory" ); |
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#else
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double *d = dst;
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size/=8*4; |
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do {
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d[0] = 0.0; |
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d[1] = 0.0; |
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d[2] = 0.0; |
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d[3] = 0.0; |
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d+=4;
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} while(--size);
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#endif
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} |
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static void clear_blocks_sh4(DCTELEM *blocks) |
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{ |
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// if (((int)blocks&7)==0)
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memzero_align8(blocks,sizeof(DCTELEM)*6*64); |
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} |
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extern void idct_sh4(DCTELEM *block); |
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static void idct_put(uint8_t *dest, int line_size, DCTELEM *block) |
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{ |
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idct_sh4(block); |
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int i;
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uint8_t *cm = cropTbl + MAX_NEG_CROP; |
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for(i=0;i<8;i++) { |
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dest[0] = cm[block[0]]; |
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dest[1] = cm[block[1]]; |
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dest[2] = cm[block[2]]; |
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dest[3] = cm[block[3]]; |
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dest[4] = cm[block[4]]; |
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dest[5] = cm[block[5]]; |
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dest[6] = cm[block[6]]; |
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dest[7] = cm[block[7]]; |
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dest+=line_size; |
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block+=8;
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} |
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} |
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static void idct_add(uint8_t *dest, int line_size, DCTELEM *block) |
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{ |
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idct_sh4(block); |
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int i;
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uint8_t *cm = cropTbl + MAX_NEG_CROP; |
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for(i=0;i<8;i++) { |
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dest[0] = cm[dest[0]+block[0]]; |
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dest[1] = cm[dest[1]+block[1]]; |
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dest[2] = cm[dest[2]+block[2]]; |
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dest[3] = cm[dest[3]+block[3]]; |
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dest[4] = cm[dest[4]+block[4]]; |
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dest[5] = cm[dest[5]+block[5]]; |
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dest[6] = cm[dest[6]+block[6]]; |
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dest[7] = cm[dest[7]+block[7]]; |
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dest+=line_size; |
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block+=8;
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} |
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} |
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extern void dsputil_init_align(DSPContext* c, AVCodecContext *avctx); |
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void dsputil_init_sh4(DSPContext* c, AVCodecContext *avctx)
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{ |
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const int idct_algo= avctx->idct_algo; |
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dsputil_init_align(c,avctx); |
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c->clear_blocks = clear_blocks_sh4; |
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if(idct_algo==FF_IDCT_AUTO || idct_algo==FF_IDCT_SH4){
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c->idct_put = idct_put; |
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c->idct_add = idct_add; |
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c->idct = idct_sh4; |
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c->idct_permutation_type= FF_NO_IDCT_PERM; //FF_SIMPLE_IDCT_PERM; //FF_LIBMPEG2_IDCT_PERM;
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} |
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} |