| 1 | /* |
| 2 | * Copyright (C) 2003 Mike Melanson |
| 3 | * Copyright (C) 2003 Dr. Tim Ferguson |
| 4 | * |
| 5 | * This file is part of FFmpeg. |
| 6 | * |
| 7 | * FFmpeg is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation; either |
| 10 | * version 2.1 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * FFmpeg is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with FFmpeg; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | /** |
| 23 | * @file |
| 24 | * id RoQ Video common functions based on work by Dr. Tim Ferguson |
| 25 | */ |
| 26 | |
| 27 | #include "avcodec.h" |
| 28 | #include "roqvideo.h" |
| 29 | |
| 30 | static inline void block_copy(unsigned char *out, unsigned char *in, |
| 31 | int outstride, int instride, int sz) |
| 32 | { |
| 33 | int rows = sz; |
| 34 | while(rows--) { |
| 35 | memcpy(out, in, sz); |
| 36 | out += outstride; |
| 37 | in += instride; |
| 38 | } |
| 39 | } |
| 40 | |
| 41 | void ff_apply_vector_2x2(RoqContext *ri, int x, int y, roq_cell *cell) |
| 42 | { |
| 43 | unsigned char *bptr; |
| 44 | int boffs,stride; |
| 45 | |
| 46 | stride = ri->current_frame->linesize[0]; |
| 47 | boffs = y*stride + x; |
| 48 | |
| 49 | bptr = ri->current_frame->data[0] + boffs; |
| 50 | bptr[0 ] = cell->y[0]; |
| 51 | bptr[1 ] = cell->y[1]; |
| 52 | bptr[stride ] = cell->y[2]; |
| 53 | bptr[stride+1] = cell->y[3]; |
| 54 | |
| 55 | stride = ri->current_frame->linesize[1]; |
| 56 | boffs = y*stride + x; |
| 57 | |
| 58 | bptr = ri->current_frame->data[1] + boffs; |
| 59 | bptr[0 ] = |
| 60 | bptr[1 ] = |
| 61 | bptr[stride ] = |
| 62 | bptr[stride+1] = cell->u; |
| 63 | |
| 64 | bptr = ri->current_frame->data[2] + boffs; |
| 65 | bptr[0 ] = |
| 66 | bptr[1 ] = |
| 67 | bptr[stride ] = |
| 68 | bptr[stride+1] = cell->v; |
| 69 | } |
| 70 | |
| 71 | void ff_apply_vector_4x4(RoqContext *ri, int x, int y, roq_cell *cell) |
| 72 | { |
| 73 | unsigned char *bptr; |
| 74 | int boffs,stride; |
| 75 | |
| 76 | stride = ri->current_frame->linesize[0]; |
| 77 | boffs = y*stride + x; |
| 78 | |
| 79 | bptr = ri->current_frame->data[0] + boffs; |
| 80 | bptr[ 0] = bptr[ 1] = bptr[stride ] = bptr[stride +1] = cell->y[0]; |
| 81 | bptr[ 2] = bptr[ 3] = bptr[stride +2] = bptr[stride +3] = cell->y[1]; |
| 82 | bptr[stride*2 ] = bptr[stride*2+1] = bptr[stride*3 ] = bptr[stride*3+1] = cell->y[2]; |
| 83 | bptr[stride*2+2] = bptr[stride*2+3] = bptr[stride*3+2] = bptr[stride*3+3] = cell->y[3]; |
| 84 | |
| 85 | stride = ri->current_frame->linesize[1]; |
| 86 | boffs = y*stride + x; |
| 87 | |
| 88 | bptr = ri->current_frame->data[1] + boffs; |
| 89 | bptr[ 0] = bptr[ 1] = bptr[stride ] = bptr[stride +1] = |
| 90 | bptr[ 2] = bptr[ 3] = bptr[stride +2] = bptr[stride +3] = |
| 91 | bptr[stride*2 ] = bptr[stride*2+1] = bptr[stride*3 ] = bptr[stride*3+1] = |
| 92 | bptr[stride*2+2] = bptr[stride*2+3] = bptr[stride*3+2] = bptr[stride*3+3] = cell->u; |
| 93 | |
| 94 | bptr = ri->current_frame->data[2] + boffs; |
| 95 | bptr[ 0] = bptr[ 1] = bptr[stride ] = bptr[stride +1] = |
| 96 | bptr[ 2] = bptr[ 3] = bptr[stride +2] = bptr[stride +3] = |
| 97 | bptr[stride*2 ] = bptr[stride*2+1] = bptr[stride*3 ] = bptr[stride*3+1] = |
| 98 | bptr[stride*2+2] = bptr[stride*2+3] = bptr[stride*3+2] = bptr[stride*3+3] = cell->v; |
| 99 | } |
| 100 | |
| 101 | |
| 102 | static inline void apply_motion_generic(RoqContext *ri, int x, int y, int deltax, |
| 103 | int deltay, int sz) |
| 104 | { |
| 105 | int mx, my, cp; |
| 106 | |
| 107 | mx = x + deltax; |
| 108 | my = y + deltay; |
| 109 | |
| 110 | /* check MV against frame boundaries */ |
| 111 | if ((mx < 0) || (mx > ri->width - sz) || |
| 112 | (my < 0) || (my > ri->height - sz)) { |
| 113 | av_log(ri->avctx, AV_LOG_ERROR, "motion vector out of bounds: MV = (%d, %d), boundaries = (0, 0, %d, %d)\n", |
| 114 | mx, my, ri->width, ri->height); |
| 115 | return; |
| 116 | } |
| 117 | |
| 118 | if (!ri->last_frame->data[0]) { |
| 119 | av_log(ri->avctx, AV_LOG_ERROR, "Invalid decode type. Invalid header?\n"); |
| 120 | return; |
| 121 | } |
| 122 | |
| 123 | for(cp = 0; cp < 3; cp++) { |
| 124 | int outstride = ri->current_frame->linesize[cp]; |
| 125 | int instride = ri->last_frame ->linesize[cp]; |
| 126 | block_copy(ri->current_frame->data[cp] + y*outstride + x, |
| 127 | ri->last_frame->data[cp] + my*instride + mx, |
| 128 | outstride, instride, sz); |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | |
| 133 | void ff_apply_motion_4x4(RoqContext *ri, int x, int y, |
| 134 | int deltax, int deltay) |
| 135 | { |
| 136 | apply_motion_generic(ri, x, y, deltax, deltay, 4); |
| 137 | } |
| 138 | |
| 139 | void ff_apply_motion_8x8(RoqContext *ri, int x, int y, |
| 140 | int deltax, int deltay) |
| 141 | { |
| 142 | apply_motion_generic(ri, x, y, deltax, deltay, 8); |
| 143 | } |