PeerStreamer

/*

 *  sh4 dsputil

 *

 * Copyright (c) 2003 BERO <bero@geocities.co.jp>

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

#include "../avcodec.h"

#include "../dsputil.h"

static void memzero_align8(void *dst,size_t size)

{

#if defined(__SH4__) || defined(__SH4_SINGLE__) || defined(__SH4_SINGLE_ONLY__)

        (char*)dst+=size;

        size/=8*4;

        asm(

#if defined(__SH4__)

        " fschg\n"  //single float mode

#endif

        " fldi0 fr0\n"

        " fldi0 fr1\n"

        " fschg\n"  // double

        "1: \n" \

        " dt %1\n"

        " fmov  dr0,@-%0\n"

        " fmov  dr0,@-%0\n"

        " fmov  dr0,@-%0\n"

        " bf.s 1b\n"

        " fmov  dr0,@-%0\n"

#if defined(__SH4_SINGLE__) || defined(__SH4_SINGLE_ONLY__)

        " fschg" //back to single

#endif

        : : "r"(dst),"r"(size): "memory" );

#else

        double *d = dst;

        size/=8*4;

        do {

                d[0] = 0.0;

                d[1] = 0.0;

                d[2] = 0.0;

                d[3] = 0.0;

                d+=4;

        } while(--size);

#endif

}

static void clear_blocks_sh4(DCTELEM *blocks)

{

//        if (((int)blocks&7)==0)

        memzero_align8(blocks,sizeof(DCTELEM)*6*64);

}

extern void idct_sh4(DCTELEM *block);

static void idct_put(uint8_t *dest, int line_size, DCTELEM *block)

{

        idct_sh4(block);

        int i;

        uint8_t *cm = cropTbl + MAX_NEG_CROP;

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

                dest[0] = cm[block[0]];

                dest[1] = cm[block[1]];

                dest[2] = cm[block[2]];

                dest[3] = cm[block[3]];

                dest[4] = cm[block[4]];

                dest[5] = cm[block[5]];

                dest[6] = cm[block[6]];

                dest[7] = cm[block[7]];

                dest+=line_size;

                block+=8;

        }

}

static void idct_add(uint8_t *dest, int line_size, DCTELEM *block)

{

        idct_sh4(block);

        int i;

        uint8_t *cm = cropTbl + MAX_NEG_CROP;

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

                dest[0] = cm[dest[0]+block[0]];

                dest[1] = cm[dest[1]+block[1]];

                dest[2] = cm[dest[2]+block[2]];

                dest[3] = cm[dest[3]+block[3]];

                dest[4] = cm[dest[4]+block[4]];

                dest[5] = cm[dest[5]+block[5]];

                dest[6] = cm[dest[6]+block[6]];

                dest[7] = cm[dest[7]+block[7]];

                dest+=line_size;

                block+=8;

        }

}

extern void dsputil_init_align(DSPContext* c, AVCodecContext *avctx);

void dsputil_init_sh4(DSPContext* c, AVCodecContext *avctx)

{

        const int idct_algo= avctx->idct_algo;

        dsputil_init_align(c,avctx);

        c->clear_blocks = clear_blocks_sh4;

        if(idct_algo==FF_IDCT_AUTO || idct_algo==FF_IDCT_SH4){

                c->idct_put = idct_put;

                c->idct_add = idct_add;

               c->idct     = idct_sh4;

                c->idct_permutation_type= FF_NO_IDCT_PERM; //FF_SIMPLE_IDCT_PERM; //FF_LIBMPEG2_IDCT_PERM;

        }

}