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Diffstat (limited to 'libcamera/converter.cpp')
| -rw-r--r-- | libcamera/converter.cpp | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/libcamera/converter.cpp b/libcamera/converter.cpp new file mode 100644 index 0000000..f0dc54d --- /dev/null +++ b/libcamera/converter.cpp @@ -0,0 +1,261 @@ +/* +** +** Copyright (C) 2009 0xlab.org - http://0xlab.org/ +** Copyright 2008, The Android Open Source Project +** +** This work is based on yuvconverter project. +** +** Licensed under the Apache License, Version 2.0 (the "License"); +** you may not use this file except in compliance with the License. +** You may obtain a copy of the License at +** +** http://www.apache.org/licenses/LICENSE-2.0 +** +** Unless required by applicable law or agreed to in writing, software +** distributed under the License is distributed on an "AS IS" BASIS, +** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +** See the License for the specific language governing permissions and +** limitations under the License. +*/ + +#include "converter.h" + +void +yuyv422_to_yuv420(unsigned char *bufsrc, unsigned char *bufdest, int width, int height) +{ + unsigned char *ptrsrcy1, *ptrsrcy2; + unsigned char *ptrsrcy3, *ptrsrcy4; + unsigned char *ptrsrccb1, *ptrsrccb2; + unsigned char *ptrsrccb3, *ptrsrccb4; + unsigned char *ptrsrccr1, *ptrsrccr2; + unsigned char *ptrsrccr3, *ptrsrccr4; + int srcystride, srcccstride; + + ptrsrcy1 = bufsrc ; + ptrsrcy2 = bufsrc + (width<<1) ; + ptrsrcy3 = bufsrc + (width<<1)*2 ; + ptrsrcy4 = bufsrc + (width<<1)*3 ; + + ptrsrccb1 = bufsrc + 1; + ptrsrccb2 = bufsrc + (width<<1) + 1; + ptrsrccb3 = bufsrc + (width<<1)*2 + 1; + ptrsrccb4 = bufsrc + (width<<1)*3 + 1; + + ptrsrccr1 = bufsrc + 3; + ptrsrccr2 = bufsrc + (width<<1) + 3; + ptrsrccr3 = bufsrc + (width<<1)*2 + 3; + ptrsrccr4 = bufsrc + (width<<1)*3 + 3; + + srcystride = (width<<1)*3; + srcccstride = (width<<1)*3; + + unsigned char *ptrdesty1, *ptrdesty2; + unsigned char *ptrdesty3, *ptrdesty4; + unsigned char *ptrdestcb1, *ptrdestcb2; + unsigned char *ptrdestcr1, *ptrdestcr2; + int destystride, destccstride; + + ptrdesty1 = bufdest; + ptrdesty2 = bufdest + width; + ptrdesty3 = bufdest + width*2; + ptrdesty4 = bufdest + width*3; + + ptrdestcb1 = bufdest + width*height; + ptrdestcb2 = bufdest + width*height + (width>>1); + + ptrdestcr1 = bufdest + width*height + ((width*height) >> 2); + ptrdestcr2 = bufdest + width*height + ((width*height) >> 2) + (width>>1); + + destystride = (width)*3; + destccstride = (width>>1); + + int i, j; + + for(j=0; j<(height/4); j++) + { + for(i=0;i<(width/2);i++) + { + (*ptrdesty1++) = (*ptrsrcy1); + (*ptrdesty2++) = (*ptrsrcy2); + (*ptrdesty3++) = (*ptrsrcy3); + (*ptrdesty4++) = (*ptrsrcy4); + + ptrsrcy1 += 2; + ptrsrcy2 += 2; + ptrsrcy3 += 2; + ptrsrcy4 += 2; + + (*ptrdesty1++) = (*ptrsrcy1); + (*ptrdesty2++) = (*ptrsrcy2); + (*ptrdesty3++) = (*ptrsrcy3); + (*ptrdesty4++) = (*ptrsrcy4); + + ptrsrcy1 += 2; + ptrsrcy2 += 2; + ptrsrcy3 += 2; + ptrsrcy4 += 2; + + (*ptrdestcb1++) = (*ptrsrccb1); + (*ptrdestcb2++) = (*ptrsrccb3); + + ptrsrccb1 += 4; + ptrsrccb3 += 4; + + (*ptrdestcr1++) = (*ptrsrccr1); + (*ptrdestcr2++) = (*ptrsrccr3); + + ptrsrccr1 += 4; + ptrsrccr3 += 4; + + } + + + /* Update src pointers */ + ptrsrcy1 += srcystride; + ptrsrcy2 += srcystride; + ptrsrcy3 += srcystride; + ptrsrcy4 += srcystride; + + ptrsrccb1 += srcccstride; + ptrsrccb3 += srcccstride; + + ptrsrccr1 += srcccstride; + ptrsrccr3 += srcccstride; + + + /* Update dest pointers */ + ptrdesty1 += destystride; + ptrdesty2 += destystride; + ptrdesty3 += destystride; + ptrdesty4 += destystride; + + ptrdestcb1 += destccstride; + ptrdestcb2 += destccstride; + + ptrdestcr1 += destccstride; + ptrdestcr2 += destccstride; + + } +} + +void +yuyv422_to_yuv420sp(unsigned char *bufsrc, unsigned char *bufdest, int width, int height) +{ + unsigned char *ptrsrcy1, *ptrsrcy2; + unsigned char *ptrsrcy3, *ptrsrcy4; + unsigned char *ptrsrccb1, *ptrsrccb2; + unsigned char *ptrsrccb3, *ptrsrccb4; + unsigned char *ptrsrccr1, *ptrsrccr2; + unsigned char *ptrsrccr3, *ptrsrccr4; + int srcystride, srcccstride; + + ptrsrcy1 = bufsrc ; + ptrsrcy2 = bufsrc + (width<<1) ; + ptrsrcy3 = bufsrc + (width<<1)*2 ; + ptrsrcy4 = bufsrc + (width<<1)*3 ; + + ptrsrccb1 = bufsrc + 1; + ptrsrccb2 = bufsrc + (width<<1) + 1; + ptrsrccb3 = bufsrc + (width<<1)*2 + 1; + ptrsrccb4 = bufsrc + (width<<1)*3 + 1; + + ptrsrccr1 = bufsrc + 3; + ptrsrccr2 = bufsrc + (width<<1) + 3; + ptrsrccr3 = bufsrc + (width<<1)*2 + 3; + ptrsrccr4 = bufsrc + (width<<1)*3 + 3; + + srcystride = (width<<1)*3; + srcccstride = (width<<1)*3; + + unsigned char *ptrdesty1, *ptrdesty2; + unsigned char *ptrdesty3, *ptrdesty4; + unsigned char *ptrdestcb1, *ptrdestcb2; + unsigned char *ptrdestcr1, *ptrdestcr2; + int destystride, destccstride; + + ptrdesty1 = bufdest; + ptrdesty2 = bufdest + width; + ptrdesty3 = bufdest + width*2; + ptrdesty4 = bufdest + width*3; + + ptrdestcb1 = bufdest + width*height; + ptrdestcb2 = bufdest + width*height + width; + + ptrdestcr1 = bufdest + width*height + 1; + ptrdestcr2 = bufdest + width*height + width + 1; + + destystride = (width)*3; + destccstride = width; + + int i, j; + + for(j=0; j<(height/4); j++) + { + for(i=0;i<(width/2);i++) + { + (*ptrdesty1++) = (*ptrsrcy1); + (*ptrdesty2++) = (*ptrsrcy2); + (*ptrdesty3++) = (*ptrsrcy3); + (*ptrdesty4++) = (*ptrsrcy4); + + ptrsrcy1 += 2; + ptrsrcy2 += 2; + ptrsrcy3 += 2; + ptrsrcy4 += 2; + + (*ptrdesty1++) = (*ptrsrcy1); + (*ptrdesty2++) = (*ptrsrcy2); + (*ptrdesty3++) = (*ptrsrcy3); + (*ptrdesty4++) = (*ptrsrcy4); + + ptrsrcy1 += 2; + ptrsrcy2 += 2; + ptrsrcy3 += 2; + ptrsrcy4 += 2; + + (*ptrdestcb1) = (*ptrsrccb1); + (*ptrdestcb2) = (*ptrsrccb3); + ptrdestcb1 += 2; + ptrdestcb2 += 2; + + ptrsrccb1 += 4; + ptrsrccb3 += 4; + + (*ptrdestcr1) = (*ptrsrccr1); + (*ptrdestcr2) = (*ptrsrccr3); + ptrdestcr1 += 2; + ptrdestcr2 += 2; + + ptrsrccr1 += 4; + ptrsrccr3 += 4; + + } + + + /* Update src pointers */ + ptrsrcy1 += srcystride; + ptrsrcy2 += srcystride; + ptrsrcy3 += srcystride; + ptrsrcy4 += srcystride; + + ptrsrccb1 += srcccstride; + ptrsrccb3 += srcccstride; + + ptrsrccr1 += srcccstride; + ptrsrccr3 += srcccstride; + + + /* Update dest pointers */ + ptrdesty1 += destystride; + ptrdesty2 += destystride; + ptrdesty3 += destystride; + ptrdesty4 += destystride; + + ptrdestcb1 += destccstride; + ptrdestcb2 += destccstride; + + ptrdestcr1 += destccstride; + ptrdestcr2 += destccstride; + + } +} |