rectangle.h
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上传日期:2022-07-08
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- /*
- * rectangle filling function
- * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg 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 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg 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 FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
- /**
- * @file rectangle.h
- * useful rectangle filling function
- * @author Michael Niedermayer <michaelni@gmx.at>
- */
- #ifndef AVCODEC_RECTANGLE_H
- #define AVCODEC_RECTANGLE_H
- #include "common.h"
- /**
- * fill a rectangle.
- * @param h height of the rectangle, should be a constant
- * @param w width of the rectangle, should be a constant
- * @param size the size of val (1 or 4), should be a constant
- */
- static av_always_inline void fill_rectangle(void *vp, int w, int h, int stride, uint32_t val, int size){
- uint8_t *p= (uint8_t*)vp;
- assert(size==1 || size==4);
- assert(w<=4);
- w *= size;
- stride *= size;
- assert((((long)vp)&(FFMIN(w, STRIDE_ALIGN)-1)) == 0);
- assert((stride&(w-1))==0);
- if(w==2)
- {
- const uint16_t v= size==4 ? val : val*0x0101;
- *(uint16_t*)(p + 0*stride)= v;
- if(h==1) return;
- *(uint16_t*)(p + 1*stride)= v;
- if(h==2) return;
- *(uint16_t*)(p + 2*stride)= v;
- *(uint16_t*)(p + 3*stride)= v;
- }
- else if(w==4)
- {
- const uint32_t v= size==4 ? val : val*0x01010101;
- *(uint32_t*)(p + 0*stride)= v;
- if(h==1) return;
- *(uint32_t*)(p + 1*stride)= v;
- if(h==2) return;
- *(uint32_t*)(p + 2*stride)= v;
- *(uint32_t*)(p + 3*stride)= v;
- }
- else if(w==8)
- {
- //gcc can't optimize 64bit math on x86_32
- #ifdef HAVE_FAST_64BIT
- const uint64_t v= val*0x0100000001ULL;
- *(uint64_t*)(p + 0*stride)= v;
- if(h==1) return;
- *(uint64_t*)(p + 1*stride)= v;
- if(h==2) return;
- *(uint64_t*)(p + 2*stride)= v;
- *(uint64_t*)(p + 3*stride)= v;
- }
- else if(w==16)
- {
- const uint64_t v= val*0x0100000001ULL;
- *(uint64_t*)(p + 0+0*stride)= v;
- *(uint64_t*)(p + 8+0*stride)= v;
- *(uint64_t*)(p + 0+1*stride)= v;
- *(uint64_t*)(p + 8+1*stride)= v;
- if(h==2)
- return;
- *(uint64_t*)(p + 0+2*stride)= v;
- *(uint64_t*)(p + 8+2*stride)= v;
- *(uint64_t*)(p + 0+3*stride)= v;
- *(uint64_t*)(p + 8+3*stride)= v;
- #else
- *(uint32_t*)(p + 0+0*stride)= val;
- *(uint32_t*)(p + 4+0*stride)= val;
- if(h==1)
- return;
- *(uint32_t*)(p + 0+1*stride)= val;
- *(uint32_t*)(p + 4+1*stride)= val;
- if(h==2)
- return;
- *(uint32_t*)(p + 0+2*stride)= val;
- *(uint32_t*)(p + 4+2*stride)= val;
- *(uint32_t*)(p + 0+3*stride)= val;
- *(uint32_t*)(p + 4+3*stride)= val;
- }
- else if(w==16)
- {
- *(uint32_t*)(p + 0+0*stride)= val;
- *(uint32_t*)(p + 4+0*stride)= val;
- *(uint32_t*)(p + 8+0*stride)= val;
- *(uint32_t*)(p +12+0*stride)= val;
- *(uint32_t*)(p + 0+1*stride)= val;
- *(uint32_t*)(p + 4+1*stride)= val;
- *(uint32_t*)(p + 8+1*stride)= val;
- *(uint32_t*)(p +12+1*stride)= val;
- if(h==2)
- return;
- *(uint32_t*)(p + 0+2*stride)= val;
- *(uint32_t*)(p + 4+2*stride)= val;
- *(uint32_t*)(p + 8+2*stride)= val;
- *(uint32_t*)(p +12+2*stride)= val;
- *(uint32_t*)(p + 0+3*stride)= val;
- *(uint32_t*)(p + 4+3*stride)= val;
- *(uint32_t*)(p + 8+3*stride)= val;
- *(uint32_t*)(p +12+3*stride)= val;
- #endif
- }
- else
- assert(0);
- assert(h==4);
- }
- #endif /* AVCODEC_RECTANGLE_H */