/* * 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 */ #include <stdint.h> #include "config.h" #include "libavutil/attributes.h" #include "mathops.h" #include "huffyuvdsp.h" // 0x00010001 or 0x0001000100010001 or whatever, depending on the cpu's native arithmetic size #define pw_1 (ULONG_MAX / UINT16_MAX) static void add_int16_c(uint16_t *dst, const uint16_t *src, unsigned mask, int w){ long i; unsigned long pw_lsb = (mask >> 1) * pw_1; unsigned long pw_msb = pw_lsb + pw_1; for (i = 0; i <= w - (int)sizeof(long)/2; i += sizeof(long)/2) { long a = *(long*)(src+i); long b = *(long*)(dst+i); *(long*)(dst+i) = ((a&pw_lsb) + (b&pw_lsb)) ^ ((a^b)&pw_msb); } for(; i<w; i++) dst[i] = (dst[i] + src[i]) & mask; } static void add_hfyu_median_pred_int16_c(uint16_t *dst, const uint16_t *src, const uint16_t *diff, unsigned mask, int w, int *left, int *left_top){ int i; uint16_t l, lt; l = *left; lt = *left_top; for(i=0; i<w; i++){ l = (mid_pred(l, src[i], (l + src[i] - lt) & mask) + diff[i]) & mask; lt = src[i]; dst[i] = l; } *left = l; *left_top = lt; } static void add_hfyu_left_pred_bgr32_c(uint8_t *dst, const uint8_t *src, intptr_t w, uint8_t *left) { int i; uint8_t r = left[R], g = left[G], b = left[B], a = left[A]; for (i = 0; i < w; i++) { b += src[4 * i + B]; g += src[4 * i + G]; r += src[4 * i + R]; a += src[4 * i + A]; dst[4 * i + B] = b; dst[4 * i + G] = g; dst[4 * i + R] = r; dst[4 * i + A] = a; } left[B] = b; left[G] = g; left[R] = r; left[A] = a; } av_cold void ff_huffyuvdsp_init(HuffYUVDSPContext *c, enum AVPixelFormat pix_fmt) { c->add_int16 = add_int16_c; c->add_hfyu_median_pred_int16 = add_hfyu_median_pred_int16_c; c->add_hfyu_left_pred_bgr32 = add_hfyu_left_pred_bgr32_c; if (ARCH_X86) ff_huffyuvdsp_init_x86(c, pix_fmt); }