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/*
* sh4 dsputil
*
* Copyright (c) 2003 BERO <bero@geocities.co.jp>
*
* This file is part of FFmpeg.
*
* FFmpeg 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 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavcodec/avcodec.h"
#include "libavcodec/dsputil.h"
#include "dsputil_sh4.h"
#include "sh4.h"
static void memzero_align8(void *dst,size_t size)
{
int fpscr;
fp_single_enter(fpscr);
dst = (char *)dst + size;
size /= 32;
__asm__ volatile (
" 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"
" fschg" //back to single
: "+r"(dst),"+r"(size) :: "memory" );
fp_single_leave(fpscr);
}
static void clear_blocks_sh4(DCTELEM *blocks)
{
memzero_align8(blocks,sizeof(DCTELEM)*6*64);
}
static void idct_put(uint8_t *dest, int line_size, DCTELEM *block)
{
int i;
uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
idct_sh4(block);
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)
{
int i;
uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
idct_sh4(block);
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;
}
}
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;
}
}
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