2 * Copyright (c) 2002 The FFmpeg Project
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "mpegutils.h"
24 #include "mpegvideo.h"
25 #include "msmpeg4data.h"
26 #include "simple_idct.h"
30 av_cold void ff_wmv2_common_init(Wmv2Context *w)
32 MpegEncContext *const s = &w->s;
34 ff_blockdsp_init(&s->bdsp, s->avctx);
35 ff_wmv2dsp_init(&w->wdsp);
36 s->idsp.perm_type = w->wdsp.idct_perm;
37 ff_init_scantable_permutation(s->idsp.idct_permutation,
39 ff_init_scantable(s->idsp.idct_permutation, &w->abt_scantable[0],
41 ff_init_scantable(s->idsp.idct_permutation, &w->abt_scantable[1],
43 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable,
44 ff_wmv1_scantable[1]);
45 ff_init_scantable(s->idsp.idct_permutation, &s->intra_h_scantable,
46 ff_wmv1_scantable[2]);
47 ff_init_scantable(s->idsp.idct_permutation, &s->intra_v_scantable,
48 ff_wmv1_scantable[3]);
49 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable,
50 ff_wmv1_scantable[0]);
51 s->idsp.idct_put = w->wdsp.idct_put;
52 s->idsp.idct_add = w->wdsp.idct_add;
56 static void wmv2_add_block(Wmv2Context *w, int16_t *block1,
57 uint8_t *dst, int stride, int n)
59 MpegEncContext *const s = &w->s;
61 if (s->block_last_index[n] >= 0) {
62 switch (w->abt_type_table[n]) {
64 w->wdsp.idct_add(dst, stride, block1);
67 ff_simple_idct84_add(dst, stride, block1);
68 ff_simple_idct84_add(dst + 4 * stride, stride, w->abt_block2[n]);
69 s->bdsp.clear_block(w->abt_block2[n]);
72 ff_simple_idct48_add(dst, stride, block1);
73 ff_simple_idct48_add(dst + 4, stride, w->abt_block2[n]);
74 s->bdsp.clear_block(w->abt_block2[n]);
77 av_log(s->avctx, AV_LOG_ERROR, "internal error in WMV2 abt\n");
82 void ff_wmv2_add_mb(MpegEncContext *s, int16_t block1[6][64],
83 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr)
85 Wmv2Context *const w = (Wmv2Context *) s;
87 wmv2_add_block(w, block1[0], dest_y, s->linesize, 0);
88 wmv2_add_block(w, block1[1], dest_y + 8, s->linesize, 1);
89 wmv2_add_block(w, block1[2], dest_y + 8 * s->linesize, s->linesize, 2);
90 wmv2_add_block(w, block1[3], dest_y + 8 + 8 * s->linesize, s->linesize, 3);
92 if (s->avctx->flags & AV_CODEC_FLAG_GRAY)
95 wmv2_add_block(w, block1[4], dest_cb, s->uvlinesize, 4);
96 wmv2_add_block(w, block1[5], dest_cr, s->uvlinesize, 5);
99 void ff_mspel_motion(MpegEncContext *s, uint8_t *dest_y,
100 uint8_t *dest_cb, uint8_t *dest_cr,
101 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
102 int motion_x, int motion_y, int h)
104 Wmv2Context *const w = (Wmv2Context *) s;
106 int dxy, mx, my, src_x, src_y, v_edge_pos;
107 ptrdiff_t offset, linesize, uvlinesize;
110 dxy = ((motion_y & 1) << 1) | (motion_x & 1);
111 dxy = 2 * dxy + w->hshift;
112 src_x = s->mb_x * 16 + (motion_x >> 1);
113 src_y = s->mb_y * 16 + (motion_y >> 1);
115 /* WARNING: do no forget half pels */
116 v_edge_pos = s->v_edge_pos;
117 src_x = av_clip(src_x, -16, s->width);
118 src_y = av_clip(src_y, -16, s->height);
120 if (src_x <= -16 || src_x >= s->width)
122 if (src_y <= -16 || src_y >= s->height)
125 linesize = s->linesize;
126 uvlinesize = s->uvlinesize;
127 ptr = ref_picture[0] + (src_y * linesize) + src_x;
129 if (src_x < 1 || src_y < 1 || src_x + 17 >= s->h_edge_pos ||
130 src_y + h + 1 >= v_edge_pos) {
131 s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr - 1 - s->linesize,
132 s->linesize, s->linesize, 19, 19,
133 src_x - 1, src_y - 1,
134 s->h_edge_pos, s->v_edge_pos);
135 ptr = s->sc.edge_emu_buffer + 1 + s->linesize;
139 w->wdsp.put_mspel_pixels_tab[dxy](dest_y, ptr, linesize);
140 w->wdsp.put_mspel_pixels_tab[dxy](dest_y + 8, ptr + 8, linesize);
141 w->wdsp.put_mspel_pixels_tab[dxy](dest_y + 8 * linesize, ptr + 8 * linesize, linesize);
142 w->wdsp.put_mspel_pixels_tab[dxy](dest_y + 8 + 8 * linesize, ptr + 8 + 8 * linesize, linesize);
144 if (s->avctx->flags & AV_CODEC_FLAG_GRAY)
148 if ((motion_x & 3) != 0)
150 if ((motion_y & 3) != 0)
155 src_x = s->mb_x * 8 + mx;
156 src_y = s->mb_y * 8 + my;
157 src_x = av_clip(src_x, -8, s->width >> 1);
158 if (src_x == (s->width >> 1))
160 src_y = av_clip(src_y, -8, s->height >> 1);
161 if (src_y == (s->height >> 1))
163 offset = (src_y * uvlinesize) + src_x;
164 ptr = ref_picture[1] + offset;
166 s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,
167 s->uvlinesize, s->uvlinesize,
170 s->h_edge_pos >> 1, s->v_edge_pos >> 1);
171 ptr = s->sc.edge_emu_buffer;
173 pix_op[1][dxy](dest_cb, ptr, uvlinesize, h >> 1);
175 ptr = ref_picture[2] + offset;
177 s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,
178 s->uvlinesize, s->uvlinesize,
181 s->h_edge_pos >> 1, s->v_edge_pos >> 1);
182 ptr = s->sc.edge_emu_buffer;
184 pix_op[1][dxy](dest_cr, ptr, uvlinesize, h >> 1);