Remove more useless parentheses.
[libav.git] / libavcodec / roqvideo.c
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3ef8be2b 1/*
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2 * Copyright (C) 2003 Mike Melanson
3 * Copyright (C) 2003 Dr. Tim Ferguson
3ef8be2b 4 *
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5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
3ef8be2b 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
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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
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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20 */
21
22/**
23 * @file roqvideo.c
55c970e3 24 * Id RoQ Video common functions based on work by Dr. Tim Ferguson
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25 */
26
3ef8be2b 27#include "avcodec.h"
55c970e3 28#include "roqvideo.h"
3ef8be2b 29
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30static 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}
3ef8be2b 40
750cbd34 41void ff_apply_vector_2x2(RoqContext *ri, int x, int y, roq_cell *cell)
3ef8be2b 42{
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43 unsigned char *bptr;
44 int boffs,stride;
45
35c621e7 46 stride = ri->current_frame->linesize[0];
737b7fb9 47 boffs = y*stride + x;
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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
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55 stride = ri->current_frame->linesize[1];
56 boffs = y*stride + x;
57
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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;
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69}
70
750cbd34 71void ff_apply_vector_4x4(RoqContext *ri, int x, int y, roq_cell *cell)
3ef8be2b 72{
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73 unsigned char *bptr;
74 int boffs,stride;
75
35c621e7 76 stride = ri->current_frame->linesize[0];
737b7fb9 77 boffs = y*stride + x;
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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];
606975ab 83 bptr[stride*2+2] = bptr[stride*2+3] = bptr[stride*3+2] = bptr[stride*3+3] = cell->y[3];
3ccda4ca 84
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85 stride = ri->current_frame->linesize[1];
86 boffs = y*stride + x;
87
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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;
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99}
100
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101
102static inline void apply_motion_generic(RoqContext *ri, int x, int y, int deltax,
103 int deltay, int sz)
3ef8be2b 104{
3ccda4ca 105 int mx, my, cp;
3ef8be2b 106
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107 mx = x + deltax;
108 my = y + deltay;
3ef8be2b 109
b9029997 110 /* check MV against frame boundaries */
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111 if ((mx < 0) || (mx > ri->width - sz) ||
112 (my < 0) || (my > ri->height - sz)) {
b9029997 113 av_log(ri->avctx, AV_LOG_ERROR, "motion vector out of bounds: MV = (%d, %d), boundaries = (0, 0, %d, %d)\n",
9489d2ef 114 mx, my, ri->width, ri->height);
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115 return;
116 }
117
a7ae617f 118 for(cp = 0; cp < 3; cp++) {
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119 int outstride = ri->current_frame->linesize[cp];
120 int instride = ri->last_frame ->linesize[cp];
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121 block_copy(ri->current_frame->data[cp] + y*outstride + x,
122 ri->last_frame->data[cp] + my*instride + mx,
35c621e7 123 outstride, instride, sz);
a7ae617f 124 }
3ccda4ca 125}
3ef8be2b 126
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127
128void ff_apply_motion_4x4(RoqContext *ri, int x, int y,
129 int deltax, int deltay)
130{
131 apply_motion_generic(ri, x, y, deltax, deltay, 4);
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132}
133
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134void ff_apply_motion_8x8(RoqContext *ri, int x, int y,
135 int deltax, int deltay)
3ef8be2b 136{
3ccda4ca 137 apply_motion_generic(ri, x, y, deltax, deltay, 8);
3ef8be2b 138}