diff options
Diffstat (limited to 'libswscale/rgb2rgb_template.c')
| -rw-r--r-- | libswscale/rgb2rgb_template.c | 68 |
1 files changed, 25 insertions, 43 deletions
diff --git a/libswscale/rgb2rgb_template.c b/libswscale/rgb2rgb_template.c index d1a43e0..c05cdc8 100644 --- a/libswscale/rgb2rgb_template.c +++ b/libswscale/rgb2rgb_template.c @@ -7,20 +7,20 @@ * palette & YUV & runtime CPU stuff by Michael (michaelni@gmx.at) * lot of big-endian byte order fixes by Alex Beregszaszi * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * 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. * - * Libav is distributed in the hope that it will be useful, + * 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 Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -238,27 +238,6 @@ static inline void rgb24to15_c(const uint8_t *src, uint8_t *dst, int src_size) } } -/* - * I use less accurate approximation here by simply left-shifting the input - * value and filling the low order bits with zeroes. This method improves PNG - * compression but this scheme cannot reproduce white exactly, since it does - * not generate an all-ones maximum value; the net effect is to darken the - * image slightly. - * - * The better method should be "left bit replication": - * - * 4 3 2 1 0 - * --------- - * 1 1 0 1 1 - * - * 7 6 5 4 3 2 1 0 - * ---------------- - * 1 1 0 1 1 1 1 0 - * |=======| |===| - * | leftmost bits repeated to fill open bits - * | - * original bits - */ static inline void rgb15tobgr24_c(const uint8_t *src, uint8_t *dst, int src_size) { @@ -268,9 +247,9 @@ static inline void rgb15tobgr24_c(const uint8_t *src, uint8_t *dst, while (s < end) { register uint16_t bgr = *s++; - *d++ = (bgr & 0x1F) << 3; - *d++ = (bgr & 0x3E0) >> 2; - *d++ = (bgr & 0x7C00) >> 7; + *d++ = ((bgr&0x001F)<<3) | ((bgr&0x001F)>> 2); + *d++ = ((bgr&0x03E0)>>2) | ((bgr&0x03E0)>> 7); + *d++ = ((bgr&0x7C00)>>7) | ((bgr&0x7C00)>>12); } } @@ -283,9 +262,9 @@ static inline void rgb16tobgr24_c(const uint8_t *src, uint8_t *dst, while (s < end) { register uint16_t bgr = *s++; - *d++ = (bgr & 0x1F) << 3; - *d++ = (bgr & 0x7E0) >> 3; - *d++ = (bgr & 0xF800) >> 8; + *d++ = ((bgr&0x001F)<<3) | ((bgr&0x001F)>> 2); + *d++ = ((bgr&0x07E0)>>3) | ((bgr&0x07E0)>> 9); + *d++ = ((bgr&0xF800)>>8) | ((bgr&0xF800)>>13); } } @@ -299,13 +278,13 @@ static inline void rgb15to32_c(const uint8_t *src, uint8_t *dst, int src_size) register uint16_t bgr = *s++; #if HAVE_BIGENDIAN *d++ = 255; - *d++ = (bgr & 0x7C00) >> 7; - *d++ = (bgr & 0x3E0) >> 2; - *d++ = (bgr & 0x1F) << 3; + *d++ = ((bgr&0x7C00)>>7) | ((bgr&0x7C00)>>12); + *d++ = ((bgr&0x03E0)>>2) | ((bgr&0x03E0)>> 7); + *d++ = ((bgr&0x001F)<<3) | ((bgr&0x001F)>> 2); #else - *d++ = (bgr & 0x1F) << 3; - *d++ = (bgr & 0x3E0) >> 2; - *d++ = (bgr & 0x7C00) >> 7; + *d++ = ((bgr&0x001F)<<3) | ((bgr&0x001F)>> 2); + *d++ = ((bgr&0x03E0)>>2) | ((bgr&0x03E0)>> 7); + *d++ = ((bgr&0x7C00)>>7) | ((bgr&0x7C00)>>12); *d++ = 255; #endif } @@ -321,13 +300,13 @@ static inline void rgb16to32_c(const uint8_t *src, uint8_t *dst, int src_size) register uint16_t bgr = *s++; #if HAVE_BIGENDIAN *d++ = 255; - *d++ = (bgr & 0xF800) >> 8; - *d++ = (bgr & 0x7E0) >> 3; - *d++ = (bgr & 0x1F) << 3; + *d++ = ((bgr&0xF800)>>8) | ((bgr&0xF800)>>13); + *d++ = ((bgr&0x07E0)>>3) | ((bgr&0x07E0)>> 9); + *d++ = ((bgr&0x001F)<<3) | ((bgr&0x001F)>> 2); #else - *d++ = (bgr & 0x1F) << 3; - *d++ = (bgr & 0x7E0) >> 3; - *d++ = (bgr & 0xF800) >> 8; + *d++ = ((bgr&0x001F)<<3) | ((bgr&0x001F)>> 2); + *d++ = ((bgr&0x07E0)>>3) | ((bgr&0x07E0)>> 9); + *d++ = ((bgr&0xF800)>>8) | ((bgr&0xF800)>>13); *d++ = 255; #endif } @@ -665,6 +644,9 @@ void rgb24toyv12_c(const uint8_t *src, uint8_t *ydst, uint8_t *udst, ydst += lumStride; src += srcStride; + if (y+1 == height) + break; + for (i = 0; i < chromWidth; i++) { unsigned int b = src[6 * i + 0]; unsigned int g = src[6 * i + 1]; |
