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 "avcodec.h"
24 #include "dsputil.h"
25
memzero_align8(void * dst,size_t size)26 static void memzero_align8(void *dst,size_t size)
27 {
28 #if defined(__SH4__) || defined(__SH4_SINGLE__) || defined(__SH4_SINGLE_ONLY__)
29 (char*)dst+=size;
30 size/=8*4;
31 asm(
32 #if defined(__SH4__)
33 " fschg\n" //single float mode
34 #endif
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 #if defined(__SH4_SINGLE__) || defined(__SH4_SINGLE_ONLY__)
46 " fschg" //back to single
47 #endif
48 : : "r"(dst),"r"(size): "memory" );
49 #else
50 double *d = dst;
51 size/=8*4;
52 do {
53 d[0] = 0.0;
54 d[1] = 0.0;
55 d[2] = 0.0;
56 d[3] = 0.0;
57 d+=4;
58 } while(--size);
59 #endif
60 }
61
clear_blocks_sh4(DCTELEM * blocks)62 static void clear_blocks_sh4(DCTELEM *blocks)
63 {
64 // if (((int)blocks&7)==0)
65 memzero_align8(blocks,sizeof(DCTELEM)*6*64);
66 }
67
68 extern void idct_sh4(DCTELEM *block);
idct_put(uint8_t * dest,int line_size,DCTELEM * block)69 static void idct_put(uint8_t *dest, int line_size, DCTELEM *block)
70 {
71 idct_sh4(block);
72 int i;
73 uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
74 for(i=0;i<8;i++) {
75 dest[0] = cm[block[0]];
76 dest[1] = cm[block[1]];
77 dest[2] = cm[block[2]];
78 dest[3] = cm[block[3]];
79 dest[4] = cm[block[4]];
80 dest[5] = cm[block[5]];
81 dest[6] = cm[block[6]];
82 dest[7] = cm[block[7]];
83 dest+=line_size;
84 block+=8;
85 }
86 }
idct_add(uint8_t * dest,int line_size,DCTELEM * block)87 static void idct_add(uint8_t *dest, int line_size, DCTELEM *block)
88 {
89 idct_sh4(block);
90 int i;
91 uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
92 for(i=0;i<8;i++) {
93 dest[0] = cm[dest[0]+block[0]];
94 dest[1] = cm[dest[1]+block[1]];
95 dest[2] = cm[dest[2]+block[2]];
96 dest[3] = cm[dest[3]+block[3]];
97 dest[4] = cm[dest[4]+block[4]];
98 dest[5] = cm[dest[5]+block[5]];
99 dest[6] = cm[dest[6]+block[6]];
100 dest[7] = cm[dest[7]+block[7]];
101 dest+=line_size;
102 block+=8;
103 }
104 }
105
106 extern void dsputil_init_align(DSPContext* c, AVCodecContext *avctx);
107
dsputil_init_sh4(DSPContext * c,AVCodecContext * avctx)108 void dsputil_init_sh4(DSPContext* c, AVCodecContext *avctx)
109 {
110 const int idct_algo= avctx->idct_algo;
111 dsputil_init_align(c,avctx);
112
113 c->clear_blocks = clear_blocks_sh4;
114 if(idct_algo==FF_IDCT_AUTO || idct_algo==FF_IDCT_SH4){
115 c->idct_put = idct_put;
116 c->idct_add = idct_add;
117 c->idct = idct_sh4;
118 c->idct_permutation_type= FF_NO_IDCT_PERM; //FF_SIMPLE_IDCT_PERM; //FF_LIBMPEG2_IDCT_PERM;
119 }
120 }
121