| /* |
| * 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); |
| } |