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/libavcodec/sh4/dsputil_sh4.c

http://github.com/FFmpeg/FFmpeg
C | 107 lines | 80 code | 6 blank | 21 comment | 5 complexity | ff06fb660ee8b6eca994a8b853cad309 MD5 | raw file
  1/*
  2 *  sh4 dsputil
  3 *
  4 * Copyright (c) 2003 BERO <bero@geocities.co.jp>
  5 *
  6 * This file is part of FFmpeg.
  7 *
  8 * FFmpeg is free software; you can redistribute it and/or
  9 * modify it under the terms of the GNU Lesser General Public
 10 * License as published by the Free Software Foundation; either
 11 * version 2.1 of the License, or (at your option) any later version.
 12 *
 13 * FFmpeg is distributed in the hope that it will be useful,
 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 16 * Lesser General Public License for more details.
 17 *
 18 * You should have received a copy of the GNU Lesser General Public
 19 * License along with FFmpeg; if not, write to the Free Software
 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 21 */
 22
 23#include "libavcodec/avcodec.h"
 24#include "libavcodec/dsputil.h"
 25#include "dsputil_sh4.h"
 26#include "sh4.h"
 27
 28static void memzero_align8(void *dst,size_t size)
 29{
 30        int fpscr;
 31        fp_single_enter(fpscr);
 32        dst = (char *)dst + size;
 33        size /= 32;
 34        __asm__ volatile (
 35        " fldi0 fr0\n"
 36        " fldi0 fr1\n"
 37        " fschg\n"  // double
 38        "1: \n" \
 39        " dt %1\n"
 40        " fmov  dr0,@-%0\n"
 41        " fmov  dr0,@-%0\n"
 42        " fmov  dr0,@-%0\n"
 43        " bf.s 1b\n"
 44        " fmov  dr0,@-%0\n"
 45        " fschg" //back to single
 46        : "+r"(dst),"+r"(size) :: "memory" );
 47        fp_single_leave(fpscr);
 48}
 49
 50static void clear_blocks_sh4(DCTELEM *blocks)
 51{
 52        memzero_align8(blocks,sizeof(DCTELEM)*6*64);
 53}
 54
 55static void idct_put(uint8_t *dest, int line_size, DCTELEM *block)
 56{
 57        int i;
 58        uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
 59        ff_idct_sh4(block);
 60        for(i=0;i<8;i++) {
 61                dest[0] = cm[block[0]];
 62                dest[1] = cm[block[1]];
 63                dest[2] = cm[block[2]];
 64                dest[3] = cm[block[3]];
 65                dest[4] = cm[block[4]];
 66                dest[5] = cm[block[5]];
 67                dest[6] = cm[block[6]];
 68                dest[7] = cm[block[7]];
 69                dest+=line_size;
 70                block+=8;
 71        }
 72}
 73static void idct_add(uint8_t *dest, int line_size, DCTELEM *block)
 74{
 75        int i;
 76        uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
 77        ff_idct_sh4(block);
 78        for(i=0;i<8;i++) {
 79                dest[0] = cm[dest[0]+block[0]];
 80                dest[1] = cm[dest[1]+block[1]];
 81                dest[2] = cm[dest[2]+block[2]];
 82                dest[3] = cm[dest[3]+block[3]];
 83                dest[4] = cm[dest[4]+block[4]];
 84                dest[5] = cm[dest[5]+block[5]];
 85                dest[6] = cm[dest[6]+block[6]];
 86                dest[7] = cm[dest[7]+block[7]];
 87                dest+=line_size;
 88                block+=8;
 89        }
 90}
 91
 92void ff_dsputil_init_sh4(DSPContext* c, AVCodecContext *avctx)
 93{
 94        const int idct_algo= avctx->idct_algo;
 95        const int high_bit_depth = avctx->bits_per_raw_sample > 8;
 96        ff_dsputil_init_align(c,avctx);
 97
 98        if (!high_bit_depth)
 99        c->clear_blocks = clear_blocks_sh4;
100        if (avctx->bits_per_raw_sample <= 8 &&
101            (idct_algo==FF_IDCT_AUTO || idct_algo==FF_IDCT_SH4)) {
102                c->idct_put = idct_put;
103                c->idct_add = idct_add;
104                c->idct     = ff_idct_sh4;
105                c->idct_permutation_type= FF_NO_IDCT_PERM;
106        }
107}