2 * Copyright (c) 2002 The Libav Project
4 * This file is part of Libav.
6 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "mpegvideo.h"
23 #include "msmpeg4data.h"
24 #include "simple_idct.h"
28 av_cold void ff_wmv2_common_init(Wmv2Context * w){
29 MpegEncContext * const s= &w->s;
31 ff_init_scantable(s->dsp.idct_permutation, &w->abt_scantable[0], ff_wmv2_scantableA);
32 ff_init_scantable(s->dsp.idct_permutation, &w->abt_scantable[1], ff_wmv2_scantableB);
35 static void wmv2_add_block(Wmv2Context *w, DCTELEM *block1, uint8_t *dst, int stride, int n){
36 MpegEncContext * const s= &w->s;
38 if (s->block_last_index[n] >= 0) {
39 switch(w->abt_type_table[n]){
41 s->dsp.idct_add (dst, stride, block1);
44 ff_simple_idct84_add(dst , stride, block1);
45 ff_simple_idct84_add(dst + 4*stride, stride, w->abt_block2[n]);
46 s->dsp.clear_block(w->abt_block2[n]);
49 ff_simple_idct48_add(dst , stride, block1);
50 ff_simple_idct48_add(dst + 4 , stride, w->abt_block2[n]);
51 s->dsp.clear_block(w->abt_block2[n]);
54 av_log(s->avctx, AV_LOG_ERROR, "internal error in WMV2 abt\n");
59 void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block1[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr){
60 Wmv2Context * const w= (Wmv2Context*)s;
62 wmv2_add_block(w, block1[0], dest_y , s->linesize, 0);
63 wmv2_add_block(w, block1[1], dest_y + 8 , s->linesize, 1);
64 wmv2_add_block(w, block1[2], dest_y + 8*s->linesize, s->linesize, 2);
65 wmv2_add_block(w, block1[3], dest_y + 8 + 8*s->linesize, s->linesize, 3);
67 if(s->flags&CODEC_FLAG_GRAY) return;
69 wmv2_add_block(w, block1[4], dest_cb , s->uvlinesize, 4);
70 wmv2_add_block(w, block1[5], dest_cr , s->uvlinesize, 5);
73 void ff_mspel_motion(MpegEncContext *s,
74 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
75 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
76 int motion_x, int motion_y, int h)
78 Wmv2Context * const w= (Wmv2Context*)s;
80 int dxy, offset, mx, my, src_x, src_y, v_edge_pos, linesize, uvlinesize;
83 dxy = ((motion_y & 1) << 1) | (motion_x & 1);
84 dxy = 2*dxy + w->hshift;
85 src_x = s->mb_x * 16 + (motion_x >> 1);
86 src_y = s->mb_y * 16 + (motion_y >> 1);
88 /* WARNING: do no forget half pels */
89 v_edge_pos = s->v_edge_pos;
90 src_x = av_clip(src_x, -16, s->width);
91 src_y = av_clip(src_y, -16, s->height);
93 if(src_x<=-16 || src_x >= s->width)
95 if(src_y<=-16 || src_y >= s->height)
98 linesize = s->linesize;
99 uvlinesize = s->uvlinesize;
100 ptr = ref_picture[0] + (src_y * linesize) + src_x;
102 if(s->flags&CODEC_FLAG_EMU_EDGE){
103 if(src_x<1 || src_y<1 || src_x + 17 >= s->h_edge_pos
104 || src_y + h+1 >= v_edge_pos){
105 s->dsp.emulated_edge_mc(s->edge_emu_buffer, ptr - 1 - s->linesize, s->linesize, 19, 19,
106 src_x-1, src_y-1, s->h_edge_pos, s->v_edge_pos);
107 ptr= s->edge_emu_buffer + 1 + s->linesize;
112 s->dsp.put_mspel_pixels_tab[dxy](dest_y , ptr , linesize);
113 s->dsp.put_mspel_pixels_tab[dxy](dest_y+8 , ptr+8 , linesize);
114 s->dsp.put_mspel_pixels_tab[dxy](dest_y +8*linesize, ptr +8*linesize, linesize);
115 s->dsp.put_mspel_pixels_tab[dxy](dest_y+8+8*linesize, ptr+8+8*linesize, linesize);
117 if(s->flags&CODEC_FLAG_GRAY) return;
119 if (s->out_format == FMT_H263) {
121 if ((motion_x & 3) != 0)
123 if ((motion_y & 3) != 0)
130 dxy = ((my & 1) << 1) | (mx & 1);
135 src_x = s->mb_x * 8 + mx;
136 src_y = s->mb_y * 8 + my;
137 src_x = av_clip(src_x, -8, s->width >> 1);
138 if (src_x == (s->width >> 1))
140 src_y = av_clip(src_y, -8, s->height >> 1);
141 if (src_y == (s->height >> 1))
143 offset = (src_y * uvlinesize) + src_x;
144 ptr = ref_picture[1] + offset;
146 s->dsp.emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize, 9, 9,
147 src_x, src_y, s->h_edge_pos>>1, s->v_edge_pos>>1);
148 ptr= s->edge_emu_buffer;
150 pix_op[1][dxy](dest_cb, ptr, uvlinesize, h >> 1);
152 ptr = ref_picture[2] + offset;
154 s->dsp.emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize, 9, 9,
155 src_x, src_y, s->h_edge_pos>>1, s->v_edge_pos>>1);
156 ptr= s->edge_emu_buffer;
158 pix_op[1][dxy](dest_cr, ptr, uvlinesize, h >> 1);