blob: 7b865fe40c5ef5a69e8c44357a3915d1bbd3a0b3
| 1 | /* |
| 2 | * This file is part of FFmpeg. |
| 3 | * |
| 4 | * FFmpeg is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU Lesser General Public |
| 6 | * License as published by the Free Software Foundation; either |
| 7 | * version 2.1 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * FFmpeg is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * Lesser General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU Lesser General Public |
| 15 | * License along with FFmpeg; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 17 | */ |
| 18 | |
| 19 | #include <stdint.h> |
| 20 | |
| 21 | #include "config.h" |
| 22 | #include "libavutil/attributes.h" |
| 23 | #include "mathops.h" |
| 24 | #include "huffyuvdsp.h" |
| 25 | |
| 26 | // 0x00010001 or 0x0001000100010001 or whatever, depending on the cpu's native arithmetic size |
| 27 | #define pw_1 (ULONG_MAX / UINT16_MAX) |
| 28 | |
| 29 | static void add_int16_c(uint16_t *dst, const uint16_t *src, unsigned mask, int w){ |
| 30 | long i; |
| 31 | unsigned long pw_lsb = (mask >> 1) * pw_1; |
| 32 | unsigned long pw_msb = pw_lsb + pw_1; |
| 33 | for (i = 0; i <= w - (int)sizeof(long)/2; i += sizeof(long)/2) { |
| 34 | long a = *(long*)(src+i); |
| 35 | long b = *(long*)(dst+i); |
| 36 | *(long*)(dst+i) = ((a&pw_lsb) + (b&pw_lsb)) ^ ((a^b)&pw_msb); |
| 37 | } |
| 38 | for(; i<w; i++) |
| 39 | dst[i] = (dst[i] + src[i]) & mask; |
| 40 | } |
| 41 | |
| 42 | 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){ |
| 43 | int i; |
| 44 | uint16_t l, lt; |
| 45 | |
| 46 | l = *left; |
| 47 | lt = *left_top; |
| 48 | |
| 49 | for(i=0; i<w; i++){ |
| 50 | l = (mid_pred(l, src[i], (l + src[i] - lt) & mask) + diff[i]) & mask; |
| 51 | lt = src[i]; |
| 52 | dst[i] = l; |
| 53 | } |
| 54 | |
| 55 | *left = l; |
| 56 | *left_top = lt; |
| 57 | } |
| 58 | |
| 59 | static void add_hfyu_left_pred_bgr32_c(uint8_t *dst, const uint8_t *src, |
| 60 | intptr_t w, uint8_t *left) |
| 61 | { |
| 62 | int i; |
| 63 | uint8_t r = left[R], g = left[G], b = left[B], a = left[A]; |
| 64 | |
| 65 | for (i = 0; i < w; i++) { |
| 66 | b += src[4 * i + B]; |
| 67 | g += src[4 * i + G]; |
| 68 | r += src[4 * i + R]; |
| 69 | a += src[4 * i + A]; |
| 70 | |
| 71 | dst[4 * i + B] = b; |
| 72 | dst[4 * i + G] = g; |
| 73 | dst[4 * i + R] = r; |
| 74 | dst[4 * i + A] = a; |
| 75 | } |
| 76 | |
| 77 | left[B] = b; |
| 78 | left[G] = g; |
| 79 | left[R] = r; |
| 80 | left[A] = a; |
| 81 | } |
| 82 | |
| 83 | av_cold void ff_huffyuvdsp_init(HuffYUVDSPContext *c, enum AVPixelFormat pix_fmt) |
| 84 | { |
| 85 | c->add_int16 = add_int16_c; |
| 86 | c->add_hfyu_median_pred_int16 = add_hfyu_median_pred_int16_c; |
| 87 | c->add_hfyu_left_pred_bgr32 = add_hfyu_left_pred_bgr32_c; |
| 88 | |
| 89 | if (ARCH_X86) |
| 90 | ff_huffyuvdsp_init_x86(c, pix_fmt); |
| 91 | } |
| 92 |