| 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 "config.h" |
| 20 | #include "libavutil/attributes.h" |
| 21 | #include "libavutil/common.h" |
| 22 | #include "mpegvideodsp.h" |
| 23 | |
| 24 | static void gmc1_c(uint8_t *dst, uint8_t *src, int stride, int h, |
| 25 | int x16, int y16, int rounder) |
| 26 | { |
| 27 | const int A = (16 - x16) * (16 - y16); |
| 28 | const int B = (x16) * (16 - y16); |
| 29 | const int C = (16 - x16) * (y16); |
| 30 | const int D = (x16) * (y16); |
| 31 | int i; |
| 32 | |
| 33 | for (i = 0; i < h; i++) { |
| 34 | dst[0] = (A * src[0] + B * src[1] + C * src[stride + 0] + D * src[stride + 1] + rounder) >> 8; |
| 35 | dst[1] = (A * src[1] + B * src[2] + C * src[stride + 1] + D * src[stride + 2] + rounder) >> 8; |
| 36 | dst[2] = (A * src[2] + B * src[3] + C * src[stride + 2] + D * src[stride + 3] + rounder) >> 8; |
| 37 | dst[3] = (A * src[3] + B * src[4] + C * src[stride + 3] + D * src[stride + 4] + rounder) >> 8; |
| 38 | dst[4] = (A * src[4] + B * src[5] + C * src[stride + 4] + D * src[stride + 5] + rounder) >> 8; |
| 39 | dst[5] = (A * src[5] + B * src[6] + C * src[stride + 5] + D * src[stride + 6] + rounder) >> 8; |
| 40 | dst[6] = (A * src[6] + B * src[7] + C * src[stride + 6] + D * src[stride + 7] + rounder) >> 8; |
| 41 | dst[7] = (A * src[7] + B * src[8] + C * src[stride + 7] + D * src[stride + 8] + rounder) >> 8; |
| 42 | dst += stride; |
| 43 | src += stride; |
| 44 | } |
| 45 | } |
| 46 | |
| 47 | void ff_gmc_c(uint8_t *dst, uint8_t *src, int stride, int h, int ox, int oy, |
| 48 | int dxx, int dxy, int dyx, int dyy, int shift, int r, |
| 49 | int width, int height) |
| 50 | { |
| 51 | int y, vx, vy; |
| 52 | const int s = 1 << shift; |
| 53 | |
| 54 | width--; |
| 55 | height--; |
| 56 | |
| 57 | for (y = 0; y < h; y++) { |
| 58 | int x; |
| 59 | |
| 60 | vx = ox; |
| 61 | vy = oy; |
| 62 | for (x = 0; x < 8; x++) { // FIXME: optimize |
| 63 | int index; |
| 64 | int src_x = vx >> 16; |
| 65 | int src_y = vy >> 16; |
| 66 | int frac_x = src_x & (s - 1); |
| 67 | int frac_y = src_y & (s - 1); |
| 68 | |
| 69 | src_x >>= shift; |
| 70 | src_y >>= shift; |
| 71 | |
| 72 | if ((unsigned) src_x < width) { |
| 73 | if ((unsigned) src_y < height) { |
| 74 | index = src_x + src_y * stride; |
| 75 | dst[y * stride + x] = |
| 76 | ((src[index] * (s - frac_x) + |
| 77 | src[index + 1] * frac_x) * (s - frac_y) + |
| 78 | (src[index + stride] * (s - frac_x) + |
| 79 | src[index + stride + 1] * frac_x) * frac_y + |
| 80 | r) >> (shift * 2); |
| 81 | } else { |
| 82 | index = src_x + av_clip(src_y, 0, height) * stride; |
| 83 | dst[y * stride + x] = |
| 84 | ((src[index] * (s - frac_x) + |
| 85 | src[index + 1] * frac_x) * s + |
| 86 | r) >> (shift * 2); |
| 87 | } |
| 88 | } else { |
| 89 | if ((unsigned) src_y < height) { |
| 90 | index = av_clip(src_x, 0, width) + src_y * stride; |
| 91 | dst[y * stride + x] = |
| 92 | ((src[index] * (s - frac_y) + |
| 93 | src[index + stride] * frac_y) * s + |
| 94 | r) >> (shift * 2); |
| 95 | } else { |
| 96 | index = av_clip(src_x, 0, width) + |
| 97 | av_clip(src_y, 0, height) * stride; |
| 98 | dst[y * stride + x] = src[index]; |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | vx += dxx; |
| 103 | vy += dyx; |
| 104 | } |
| 105 | ox += dxy; |
| 106 | oy += dyy; |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | av_cold void ff_mpegvideodsp_init(MpegVideoDSPContext *c) |
| 111 | { |
| 112 | c->gmc1 = gmc1_c; |
| 113 | c->gmc = ff_gmc_c; |
| 114 | |
| 115 | if (ARCH_PPC) |
| 116 | ff_mpegvideodsp_init_ppc(c); |
| 117 | if (ARCH_X86) |
| 118 | ff_mpegvideodsp_init_x86(c); |
| 119 | } |