dsputil_sh4.c
资源名称:tcpmp.rar [点击查看]
上传用户:wstnjxml
上传日期:2014-04-03
资源大小:7248k
文件大小:3k
源码类别:
Windows CE
开发平台:
C/C++
- /*
- * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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__)
- " fschgn" //single float mode
- #endif
- " fldi0 fr0n"
- " fldi0 fr1n"
- " fschgn" // double
- "1: n"
- " dt %1n"
- " fmov dr0,@-%0n"
- " fmov dr0,@-%0n"
- " fmov dr0,@-%0n"
- " bf.s 1bn"
- " fmov dr0,@-%0n"
- #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;
- }
- }