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 "mpegvideo.h"
25 #include "msmpeg4data.h"
30 static int encode_ext_header(Wmv2Context *w){
31 MpegEncContext * const s= &w->s;
35 init_put_bits(&pb, s->avctx->extradata, s->avctx->extradata_size);
37 put_bits(&pb, 5, s->avctx->time_base.den / s->avctx->time_base.num); //yes 29.97 -> 29
38 put_bits(&pb, 11, FFMIN(s->bit_rate/1024, 2047));
40 put_bits(&pb, 1, w->mspel_bit=1);
41 put_bits(&pb, 1, s->loop_filter);
42 put_bits(&pb, 1, w->abt_flag=1);
43 put_bits(&pb, 1, w->j_type_bit=1);
44 put_bits(&pb, 1, w->top_left_mv_flag=0);
45 put_bits(&pb, 1, w->per_mb_rl_bit=1);
46 put_bits(&pb, 3, code=1);
50 s->slice_height = s->mb_height / code;
55 static av_cold int wmv2_encode_init(AVCodecContext *avctx){
56 Wmv2Context * const w= avctx->priv_data;
58 if(ff_MPV_encode_init(avctx) < 0)
61 ff_wmv2_common_init(w);
63 avctx->extradata_size= 4;
64 avctx->extradata= av_mallocz(avctx->extradata_size + 10);
70 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number)
72 Wmv2Context * const w= (Wmv2Context*)s;
74 put_bits(&s->pb, 1, s->pict_type - 1);
75 if(s->pict_type == AV_PICTURE_TYPE_I){
76 put_bits(&s->pb, 7, 0);
78 put_bits(&s->pb, 5, s->qscale);
80 s->dc_table_index = 1;
81 s->mv_table_index = 1; /* only if P frame */
82 s->per_mb_rl_table = 0;
88 av_assert0(s->flipflop_rounding);
90 if (s->pict_type == AV_PICTURE_TYPE_I) {
91 av_assert0(s->no_rounding==1);
92 if(w->j_type_bit) put_bits(&s->pb, 1, w->j_type);
94 if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table);
96 if(!s->per_mb_rl_table){
97 ff_msmpeg4_code012(&s->pb, s->rl_chroma_table_index);
98 ff_msmpeg4_code012(&s->pb, s->rl_table_index);
101 put_bits(&s->pb, 1, s->dc_table_index);
103 s->inter_intra_pred= 0;
107 put_bits(&s->pb, 2, SKIP_TYPE_NONE);
109 ff_msmpeg4_code012(&s->pb, cbp_index=0);
112 w->cbp_table_index= map[cbp_index];
113 }else if(s->qscale <= 20){
115 w->cbp_table_index= map[cbp_index];
118 w->cbp_table_index= map[cbp_index];
121 if(w->mspel_bit) put_bits(&s->pb, 1, s->mspel);
124 put_bits(&s->pb, 1, w->per_mb_abt^1);
126 ff_msmpeg4_code012(&s->pb, w->abt_type);
130 if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table);
132 if(!s->per_mb_rl_table){
133 ff_msmpeg4_code012(&s->pb, s->rl_table_index);
134 s->rl_chroma_table_index = s->rl_table_index;
136 put_bits(&s->pb, 1, s->dc_table_index);
137 put_bits(&s->pb, 1, s->mv_table_index);
139 s->inter_intra_pred= 0;//(s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
141 s->esc3_level_length= 0;
142 s->esc3_run_length= 0;
147 /* Nearly identical to wmv1 but that is just because we do not use the
148 * useless M$ crap features. It is duplicated here in case someone wants
149 * to add support for these crap features. */
150 void ff_wmv2_encode_mb(MpegEncContext * s,
151 DCTELEM block[6][64],
152 int motion_x, int motion_y)
154 Wmv2Context * const w= (Wmv2Context*)s;
155 int cbp, coded_cbp, i;
157 uint8_t *coded_block;
159 ff_msmpeg4_handle_slices(s);
164 for (i = 0; i < 6; i++) {
165 if (s->block_last_index[i] >= 0)
170 ff_wmv2_inter_table[w->cbp_table_index][cbp + 64][1],
171 ff_wmv2_inter_table[w->cbp_table_index][cbp + 64][0]);
174 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
175 ff_msmpeg4_encode_motion(s, motion_x - pred_x,
181 for (i = 0; i < 6; i++) {
183 val = (s->block_last_index[i] >= 1);
184 cbp |= val << (5 - i);
186 /* predict value for close blocks only for luma */
187 pred = ff_msmpeg4_coded_block_pred(s, i, &coded_block);
191 coded_cbp |= val << (5 - i);
194 if (s->pict_type == AV_PICTURE_TYPE_I) {
196 ff_msmp4_mb_i_table[coded_cbp][1], ff_msmp4_mb_i_table[coded_cbp][0]);
199 ff_wmv2_inter_table[w->cbp_table_index][cbp][1],
200 ff_wmv2_inter_table[w->cbp_table_index][cbp][0]);
202 put_bits(&s->pb, 1, 0); /* no AC prediction yet */
203 if(s->inter_intra_pred){
205 put_bits(&s->pb, ff_table_inter_intra[s->h263_aic_dir][1], ff_table_inter_intra[s->h263_aic_dir][0]);
209 for (i = 0; i < 6; i++) {
210 ff_msmpeg4_encode_block(s, block[i], i);
214 AVCodec ff_wmv2_encoder = {
216 .type = AVMEDIA_TYPE_VIDEO,
217 .id = AV_CODEC_ID_WMV2,
218 .priv_data_size = sizeof(Wmv2Context),
219 .init = wmv2_encode_init,
220 .encode2 = ff_MPV_encode_picture,
221 .close = ff_MPV_encode_end,
222 .pix_fmts = (const enum PixelFormat[]){ PIX_FMT_YUV420P, PIX_FMT_NONE },
223 .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"),