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rectangle.h
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1 /*
2  * rectangle filling function
3  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * useful rectangle filling function
25  * @author Michael Niedermayer <michaelni@gmx.at>
26  */
27 
28 #ifndef AVCODEC_RECTANGLE_H
29 #define AVCODEC_RECTANGLE_H
30 
31 #include "config.h"
32 #include "libavutil/common.h"
33 #include "libavutil/avassert.h"
34 
35 /**
36  * fill a rectangle.
37  * @param h height of the rectangle, should be a constant
38  * @param w width of the rectangle, should be a constant
39  * @param size the size of val (1, 2 or 4), should be a constant
40  */
41 static av_always_inline void fill_rectangle(void *vp, int w, int h, int stride, uint32_t val, int size){
42  uint8_t *p= (uint8_t*)vp;
43  av_assert2(size==1 || size==2 || size==4);
44  av_assert2(w<=4);
45 
46  w *= size;
47  stride *= size;
48 
49  av_assert2((((long)vp)&(FFMIN(w, 8<<(HAVE_NEON|ARCH_PPC|HAVE_MMX))-1)) == 0);
50  av_assert2((stride&(w-1))==0);
51  if(w==2){
52  const uint16_t v= size==4 ? val : val*0x0101;
53  *(uint16_t*)(p + 0*stride)= v;
54  if(h==1) return;
55  *(uint16_t*)(p + 1*stride)= v;
56  if(h==2) return;
57  *(uint16_t*)(p + 2*stride)= v;
58  *(uint16_t*)(p + 3*stride)= v;
59  }else if(w==4){
60  const uint32_t v= size==4 ? val : size==2 ? val*0x00010001 : val*0x01010101;
61  *(uint32_t*)(p + 0*stride)= v;
62  if(h==1) return;
63  *(uint32_t*)(p + 1*stride)= v;
64  if(h==2) return;
65  *(uint32_t*)(p + 2*stride)= v;
66  *(uint32_t*)(p + 3*stride)= v;
67  }else if(w==8){
68  // gcc cannot optimize 64-bit math on x86_32
69 #if HAVE_FAST_64BIT
70  const uint64_t v= size==2 ? val*0x0001000100010001ULL : val*0x0100000001ULL;
71  *(uint64_t*)(p + 0*stride)= v;
72  if(h==1) return;
73  *(uint64_t*)(p + 1*stride)= v;
74  if(h==2) return;
75  *(uint64_t*)(p + 2*stride)= v;
76  *(uint64_t*)(p + 3*stride)= v;
77  }else if(w==16){
78  const uint64_t v= val*0x0100000001ULL;
79  *(uint64_t*)(p + 0+0*stride)= v;
80  *(uint64_t*)(p + 8+0*stride)= v;
81  *(uint64_t*)(p + 0+1*stride)= v;
82  *(uint64_t*)(p + 8+1*stride)= v;
83  if(h==2) return;
84  *(uint64_t*)(p + 0+2*stride)= v;
85  *(uint64_t*)(p + 8+2*stride)= v;
86  *(uint64_t*)(p + 0+3*stride)= v;
87  *(uint64_t*)(p + 8+3*stride)= v;
88 #else
89  const uint32_t v= size==2 ? val*0x00010001 : val;
90  *(uint32_t*)(p + 0+0*stride)= v;
91  *(uint32_t*)(p + 4+0*stride)= v;
92  if(h==1) return;
93  *(uint32_t*)(p + 0+1*stride)= v;
94  *(uint32_t*)(p + 4+1*stride)= v;
95  if(h==2) return;
96  *(uint32_t*)(p + 0+2*stride)= v;
97  *(uint32_t*)(p + 4+2*stride)= v;
98  *(uint32_t*)(p + 0+3*stride)= v;
99  *(uint32_t*)(p + 4+3*stride)= v;
100  }else if(w==16){
101  *(uint32_t*)(p + 0+0*stride)= val;
102  *(uint32_t*)(p + 4+0*stride)= val;
103  *(uint32_t*)(p + 8+0*stride)= val;
104  *(uint32_t*)(p +12+0*stride)= val;
105  *(uint32_t*)(p + 0+1*stride)= val;
106  *(uint32_t*)(p + 4+1*stride)= val;
107  *(uint32_t*)(p + 8+1*stride)= val;
108  *(uint32_t*)(p +12+1*stride)= val;
109  if(h==2) return;
110  *(uint32_t*)(p + 0+2*stride)= val;
111  *(uint32_t*)(p + 4+2*stride)= val;
112  *(uint32_t*)(p + 8+2*stride)= val;
113  *(uint32_t*)(p +12+2*stride)= val;
114  *(uint32_t*)(p + 0+3*stride)= val;
115  *(uint32_t*)(p + 4+3*stride)= val;
116  *(uint32_t*)(p + 8+3*stride)= val;
117  *(uint32_t*)(p +12+3*stride)= val;
118 #endif
119  }else
120  av_assert2(0);
121  av_assert2(h==4);
122 }
123 
124 #endif /* AVCODEC_RECTANGLE_H */
const char const char void * val
Definition: avisynth_c.h:771
uint8_t
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:63
ptrdiff_t size
Definition: opengl_enc.c:101
static av_always_inline void fill_rectangle(void *vp, int w, int h, int stride, uint32_t val, int size)
fill a rectangle.
Definition: rectangle.h:41
simple assert() macros that are a bit more flexible than ISO C assert().
#define FFMIN(a, b)
Definition: common.h:96
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
common internal and external API header
#define av_always_inline
Definition: attributes.h:39