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ffmpeg / libavcodec / sh4 / dsputil_sh4.c @ b82cdc72

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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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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_permutation_type= FF_NO_IDCT_PERM; //FF_SIMPLE_IDCT_PERM; //FF_LIBMPEG2_IDCT_PERM;
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        }
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}