quicktime/ffmpeg/libavcodec/sh4/dsputil_sh4.c

   1 /*
   2  *  sh4 dsputil
   3  *
   4  * Copyright (c) 2003 BERO <bero@geocities.co.jp>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "../avcodec.h"
  22 #include "../dsputil.h"
  23
  24 static void memzero_align8(void *dst,size_t size)
  25 {
  26 #if defined(__SH4__) || defined(__SH4_SINGLE__) || defined(__SH4_SINGLE_ONLY__)
  27         (char*)dst+=size;
  28         size/=8*4;
  29         asm(
  30 #if defined(__SH4__)
  31         " fschg\n"  //single float mode
  32 #endif
  33         " fldi0 fr0\n"
  34         " fldi0 fr1\n"
  35         " fschg\n"  // double
  36         "1: \n" \
  37         " dt %1\n"
  38         " fmov  dr0,@-%0\n"
  39         " fmov  dr0,@-%0\n"
  40         " fmov  dr0,@-%0\n"
  41         " bf.s 1b\n"
  42         " fmov  dr0,@-%0\n"
  43 #if defined(__SH4_SINGLE__) || defined(__SH4_SINGLE_ONLY__)
  44         " fschg" //back to single
  45 #endif
  46         : : "r"(dst),"r"(size): "memory" );
  47 #else
  48         double *d = dst;
  49         size/=8*4;
  50         do {
  51                 d[0] = 0.0;
  52                 d[1] = 0.0;
  53                 d[2] = 0.0;
  54                 d[3] = 0.0;
  55                 d+=4;
  56         } while(--size);
  57 #endif
  58 }
  59
  60 static void clear_blocks_sh4(DCTELEM *blocks)
  61 {
  62 //      if (((int)blocks&7)==0)
  63         memzero_align8(blocks,sizeof(DCTELEM)*6*64);
  64 }
  65
  66 extern void idct_sh4(DCTELEM *block);
  67 static void idct_put(uint8_t *dest, int line_size, DCTELEM *block)
  68 {
  69         idct_sh4(block);
  70         int i;
  71         uint8_t *cm = cropTbl + MAX_NEG_CROP;
  72         for(i=0;i<8;i++) {
  73                 dest[0] = cm[block[0]];
  74                 dest[1] = cm[block[1]];
  75                 dest[2] = cm[block[2]];
  76                 dest[3] = cm[block[3]];
  77                 dest[4] = cm[block[4]];
  78                 dest[5] = cm[block[5]];
  79                 dest[6] = cm[block[6]];
  80                 dest[7] = cm[block[7]];
  81                 dest+=line_size;
  82                 block+=8;
  83         }
  84 }
  85 static void idct_add(uint8_t *dest, int line_size, DCTELEM *block)
  86 {
  87         idct_sh4(block);
  88         int i;
  89         uint8_t *cm = cropTbl + MAX_NEG_CROP;
  90         for(i=0;i<8;i++) {
  91                 dest[0] = cm[dest[0]+block[0]];
  92                 dest[1] = cm[dest[1]+block[1]];
  93                 dest[2] = cm[dest[2]+block[2]];
  94                 dest[3] = cm[dest[3]+block[3]];
  95                 dest[4] = cm[dest[4]+block[4]];
  96                 dest[5] = cm[dest[5]+block[5]];
  97                 dest[6] = cm[dest[6]+block[6]];
  98                 dest[7] = cm[dest[7]+block[7]];
  99                 dest+=line_size;
 100                 block+=8;
 101         }
 102 }
 103
 104 extern void dsputil_init_align(DSPContext* c, AVCodecContext *avctx);
 105
 106 void dsputil_init_sh4(DSPContext* c, AVCodecContext *avctx)
 107 {
 108         const int idct_algo= avctx->idct_algo;
 109         dsputil_init_align(c,avctx);
 110
 111         c->clear_blocks = clear_blocks_sh4;
 112         if(idct_algo==FF_IDCT_AUTO || idct_algo==FF_IDCT_SH4){
 113                 c->idct_put = idct_put;
 114                 c->idct_add = idct_add;
 115                c->idct     = idct_sh4;
 116                 c->idct_permutation_type= FF_NO_IDCT_PERM; //FF_SIMPLE_IDCT_PERM; //FF_LIBMPEG2_IDCT_PERM;
 117         }
 118 }