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ffmpeg / libavcodec / sh4 / dsputil_sh4.c @ 8dbe5856

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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 file is part of FFmpeg.
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 *
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 * FFmpeg 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 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg 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 FFmpeg; 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 "libavcodec/avcodec.h"
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#include "libavcodec/dsputil.h"
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#include "dsputil_sh4.h"
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#include "sh4.h"
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static void memzero_align8(void *dst,size_t size)
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{
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        int fpscr;
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        fp_single_enter(fpscr);
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        dst = (char *)dst + size;
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        size /= 32;
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        __asm__ volatile (
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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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        " fschg" //back to single
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        : "+r"(dst),"+r"(size) :: "memory" );
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        fp_single_leave(fpscr);
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}
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static void clear_blocks_sh4(DCTELEM *blocks)
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{
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        memzero_align8(blocks,sizeof(DCTELEM)*6*64);
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}
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static void idct_put(uint8_t *dest, int line_size, DCTELEM *block)
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{
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        int i;
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        uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
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        idct_sh4(block);
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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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        int i;
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        uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
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        idct_sh4(block);
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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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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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        const int h264_high_depth = avctx->codec_id == CODEC_ID_H264 && avctx->bits_per_raw_sample > 8;
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        dsputil_init_align(c,avctx);
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        if (!h264_high_depth)
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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;
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        }
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}