mirror of
https://github.com/FFmpeg/FFmpeg.git
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237 lines
6.6 KiB
C
237 lines
6.6 KiB
C
/*
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* Bayer-to-RGB/YV12 template
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* Copyright (c) 2011-2014 Peter Ross <pross@xvid.org>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#if defined(BAYER_BGGR) || defined(BAYER_GBRG)
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#define BAYER_R 0
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#define BAYER_G 1
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#define BAYER_B 2
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#endif
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#if defined(BAYER_RGGB) || defined(BAYER_GRBG)
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#define BAYER_R 2
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#define BAYER_G 1
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#define BAYER_B 0
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#endif
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#if defined(BAYER_8)
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#define BAYER_READ(x) (x)
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#define BAYER_SIZEOF 1
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#define BAYER_SHIFT 0
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#endif
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#if defined(BAYER_16LE)
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#define BAYER_READ(x) AV_RL16(&x)
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#define BAYER_SIZEOF 2
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#define BAYER_SHIFT 8
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#endif
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#if defined(BAYER_16BE)
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#define BAYER_READ(x) AV_RB16(&x)
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#define BAYER_SIZEOF 2
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#define BAYER_SHIFT 8
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#endif
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#define S(y, x) BAYER_READ(src[(y)*src_stride + BAYER_SIZEOF*(x)])
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#define T(y, x) (unsigned int)S(y, x)
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#define R(y, x) dst[(y)*dst_stride + (x)*3 + BAYER_R]
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#define G(y, x) dst[(y)*dst_stride + (x)*3 + BAYER_G]
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#define B(y, x) dst[(y)*dst_stride + (x)*3 + BAYER_B]
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#if defined(BAYER_BGGR) || defined(BAYER_RGGB)
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#define BAYER_TO_RGB24_COPY \
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R(0, 0) = \
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R(0, 1) = \
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R(1, 1) = \
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R(1, 0) = S(1, 1) >> BAYER_SHIFT; \
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\
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G(0, 1) = S(0, 1) >> BAYER_SHIFT; \
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G(0, 0) = \
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G(1, 1) = (T(0, 1) + T(1, 0)) >> (1 + BAYER_SHIFT); \
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G(1, 0) = S(1, 0) >> BAYER_SHIFT; \
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\
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B(1, 1) = \
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B(0, 0) = \
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B(0, 1) = \
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B(1, 0) = S(0, 0) >> BAYER_SHIFT;
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#define BAYER_TO_RGB24_INTERPOLATE \
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R(0, 0) = (T(-1, -1) + T(-1, 1) + T(1, -1) + T(1, 1)) >> (2 + BAYER_SHIFT); \
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G(0, 0) = (T(-1, 0) + T( 0, -1) + T(0, 1) + T(1, 0)) >> (2 + BAYER_SHIFT); \
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B(0, 0) = S(0, 0) >> BAYER_SHIFT; \
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\
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R(0, 1) = (T(-1, 1) + T(1, 1)) >> (1 + BAYER_SHIFT); \
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G(0, 1) = S(0, 1) >> BAYER_SHIFT; \
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B(0, 1) = (T(0, 0) + T(0, 2)) >> (1 + BAYER_SHIFT); \
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\
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R(1, 0) = (T(1, -1) + T(1, 1)) >> (1 + BAYER_SHIFT); \
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G(1, 0) = S(1, 0) >> BAYER_SHIFT; \
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B(1, 0) = (T(0, 0) + T(2, 0)) >> (1 + BAYER_SHIFT); \
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\
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R(1, 1) = S(1, 1) >> BAYER_SHIFT; \
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G(1, 1) = (T(0, 1) + T(1, 0) + T(1, 2) + T(2, 1)) >> (2 + BAYER_SHIFT); \
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B(1, 1) = (T(0, 0) + T(0, 2) + T(2, 0) + T(2, 2)) >> (2 + BAYER_SHIFT);
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#else
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#define BAYER_TO_RGB24_COPY \
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R(0, 0) = \
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R(0, 1) = \
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R(1, 1) = \
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R(1, 0) = S(1, 0) >> BAYER_SHIFT; \
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\
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G(0, 0) = S(0, 0) >> BAYER_SHIFT; \
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G(1, 1) = S(1, 1) >> BAYER_SHIFT; \
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G(0, 1) = \
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G(1, 0) = (T(0, 0) + T(1, 1)) >> (1 + BAYER_SHIFT); \
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\
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B(1, 1) = \
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B(0, 0) = \
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B(0, 1) = \
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B(1, 0) = S(0, 1) >> BAYER_SHIFT;
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#define BAYER_TO_RGB24_INTERPOLATE \
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R(0, 0) = (T(-1, 0) + T(1, 0)) >> (1 + BAYER_SHIFT); \
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G(0, 0) = S(0, 0) >> BAYER_SHIFT; \
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B(0, 0) = (T(0, -1) + T(0, 1)) >> (1 + BAYER_SHIFT); \
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\
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R(0, 1) = (T(-1, 0) + T(-1, 2) + T(1, 0) + T(1, 2)) >> (2 + BAYER_SHIFT); \
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G(0, 1) = (T(-1, 1) + T(0, 0) + T(0, 2) + T(1, 1)) >> (2 + BAYER_SHIFT); \
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B(0, 1) = S(0, 1) >> BAYER_SHIFT; \
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\
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R(1, 0) = S(1, 0) >> BAYER_SHIFT; \
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G(1, 0) = (T(0, 0) + T(1, -1) + T(1, 1) + T(2, 0)) >> (2 + BAYER_SHIFT); \
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B(1, 0) = (T(0, -1) + T(0, 1) + T(2, -1) + T(2, 1)) >> (2 + BAYER_SHIFT); \
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\
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R(1, 1) = (T(1, 0) + T(1, 2)) >> (1 + BAYER_SHIFT); \
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G(1, 1) = S(1, 1) >> BAYER_SHIFT; \
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B(1, 1) = (T(0, 1) + T(2, 1)) >> (1 + BAYER_SHIFT);
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#endif
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/**
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* invoke ff_rgb24toyv12 for 2x2 pixels
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*/
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#define rgb24toyv12_2x2(src, dstY, dstU, dstV, luma_stride, src_stride, rgb2yuv) \
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ff_rgb24toyv12(src, dstY, dstV, dstU, 2, 2, luma_stride, 0, src_stride, rgb2yuv)
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static void BAYER_RENAME(rgb24_copy)(const uint8_t *src, int src_stride, uint8_t *dst, int dst_stride, int width)
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{
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int i;
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for (i = 0 ; i < width; i+= 2) {
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BAYER_TO_RGB24_COPY
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src += 2 * BAYER_SIZEOF;
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dst += 6;
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}
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}
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static void BAYER_RENAME(rgb24_interpolate)(const uint8_t *src, int src_stride, uint8_t *dst, int dst_stride, int width)
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{
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int i;
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BAYER_TO_RGB24_COPY
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src += 2 * BAYER_SIZEOF;
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dst += 6;
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for (i = 2 ; i < width - 2; i+= 2) {
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BAYER_TO_RGB24_INTERPOLATE
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src += 2 * BAYER_SIZEOF;
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dst += 6;
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}
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if (width > 2) {
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BAYER_TO_RGB24_COPY
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}
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}
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static void BAYER_RENAME(yv12_copy)(const uint8_t *src, int src_stride, uint8_t *dstY, uint8_t *dstU, uint8_t *dstV, int luma_stride, int width, int32_t *rgb2yuv)
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{
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uint8_t dst[12];
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const int dst_stride = 6;
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int i;
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for (i = 0 ; i < width; i+= 2) {
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BAYER_TO_RGB24_COPY
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rgb24toyv12_2x2(dst, dstY, dstU, dstV, luma_stride, dst_stride, rgb2yuv);
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src += 2 * BAYER_SIZEOF;
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dstY += 2;
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dstU++;
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dstV++;
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}
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}
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static void BAYER_RENAME(yv12_interpolate)(const uint8_t *src, int src_stride, uint8_t *dstY, uint8_t *dstU, uint8_t *dstV, int luma_stride, int width, int32_t *rgb2yuv)
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{
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uint8_t dst[12];
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const int dst_stride = 6;
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int i;
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BAYER_TO_RGB24_COPY
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rgb24toyv12_2x2(dst, dstY, dstU, dstV, luma_stride, dst_stride, rgb2yuv);
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src += 2 * BAYER_SIZEOF;
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dstY += 2;
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dstU++;
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dstV++;
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for (i = 2 ; i < width - 2; i+= 2) {
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BAYER_TO_RGB24_INTERPOLATE
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rgb24toyv12_2x2(dst, dstY, dstU, dstV, luma_stride, dst_stride, rgb2yuv);
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src += 2 * BAYER_SIZEOF;
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dstY += 2;
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dstU++;
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dstV++;
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}
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if (width > 2) {
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BAYER_TO_RGB24_COPY
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rgb24toyv12_2x2(dst, dstY, dstU, dstV, luma_stride, dst_stride, rgb2yuv);
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}
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}
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#undef S
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#undef T
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#undef R
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#undef G
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#undef B
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#undef BAYER_TO_RGB24_COPY
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#undef BAYER_TO_RGB24_INTERPOLATE
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#undef BAYER_RENAME
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#undef BAYER_R
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#undef BAYER_G
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#undef BAYER_B
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#undef BAYER_READ
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#undef BAYER_SIZEOF
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#undef BAYER_SHIFT
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#if defined(BAYER_BGGR)
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#undef BAYER_BGGR
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#endif
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#if defined(BAYER_RGGB)
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#undef BAYER_RGGB
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#endif
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#if defined(BAYER_GBRG)
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#undef BAYER_GBRG
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#endif
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#if defined(BAYER_GRBG)
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#undef BAYER_GRBG
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#endif
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#if defined(BAYER_8)
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#undef BAYER_8
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#endif
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#if defined(BAYER_16LE)
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#undef BAYER_16LE
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#endif
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#if defined(BAYER_16BE)
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#undef BAYER_16BE
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#endif
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