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
22 #include "mpegvideo.h"
24 #include "msmpeg4data.h"
29 static int encode_ext_header(Wmv2Context *w){
30 MpegEncContext * const s= &w->s;
34 init_put_bits(&pb, s->avctx->extradata, s->avctx->extradata_size);
36 put_bits(&pb, 5, s->avctx->time_base.den / s->avctx->time_base.num); //yes 29.97 -> 29
37 put_bits(&pb, 11, FFMIN(s->bit_rate/1024, 2047));
39 put_bits(&pb, 1, w->mspel_bit=1);
40 put_bits(&pb, 1, s->loop_filter);
41 put_bits(&pb, 1, w->abt_flag=1);
42 put_bits(&pb, 1, w->j_type_bit=1);
43 put_bits(&pb, 1, w->top_left_mv_flag=0);
44 put_bits(&pb, 1, w->per_mb_rl_bit=1);
45 put_bits(&pb, 3, code=1);
49 s->slice_height = s->mb_height / code;
54 static av_cold int wmv2_encode_init(AVCodecContext *avctx){
55 Wmv2Context * const w= avctx->priv_data;
57 if(ff_MPV_encode_init(avctx) < 0)
60 ff_wmv2_common_init(w);
62 avctx->extradata_size= 4;
63 avctx->extradata= av_mallocz(avctx->extradata_size + 10);
69 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number)
71 Wmv2Context * const w= (Wmv2Context*)s;
73 put_bits(&s->pb, 1, s->pict_type - 1);
74 if(s->pict_type == AV_PICTURE_TYPE_I){
75 put_bits(&s->pb, 7, 0);
77 put_bits(&s->pb, 5, s->qscale);
79 s->dc_table_index = 1;
80 s->mv_table_index = 1; /* only if P frame */
81 s->per_mb_rl_table = 0;
87 av_assert0(s->flipflop_rounding);
89 if (s->pict_type == AV_PICTURE_TYPE_I) {
90 av_assert0(s->no_rounding==1);
91 if(w->j_type_bit) put_bits(&s->pb, 1, w->j_type);
93 if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table);
95 if(!s->per_mb_rl_table){
96 ff_msmpeg4_code012(&s->pb, s->rl_chroma_table_index);
97 ff_msmpeg4_code012(&s->pb, s->rl_table_index);
100 put_bits(&s->pb, 1, s->dc_table_index);
102 s->inter_intra_pred= 0;
106 put_bits(&s->pb, 2, SKIP_TYPE_NONE);
108 ff_msmpeg4_code012(&s->pb, cbp_index=0);
111 w->cbp_table_index= map[cbp_index];
112 }else if(s->qscale <= 20){
114 w->cbp_table_index= map[cbp_index];
117 w->cbp_table_index= map[cbp_index];
120 if(w->mspel_bit) put_bits(&s->pb, 1, s->mspel);
123 put_bits(&s->pb, 1, w->per_mb_abt^1);
125 ff_msmpeg4_code012(&s->pb, w->abt_type);
129 if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table);
131 if(!s->per_mb_rl_table){
132 ff_msmpeg4_code012(&s->pb, s->rl_table_index);
133 s->rl_chroma_table_index = s->rl_table_index;
135 put_bits(&s->pb, 1, s->dc_table_index);
136 put_bits(&s->pb, 1, s->mv_table_index);
138 s->inter_intra_pred= 0;//(s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
140 s->esc3_level_length= 0;
141 s->esc3_run_length= 0;
146 /* Nearly identical to wmv1 but that is just because we do not use the
147 * useless M$ crap features. It is duplicated here in case someone wants
148 * to add support for these crap features. */
149 void ff_wmv2_encode_mb(MpegEncContext * s,
150 int16_t block[6][64],
151 int motion_x, int motion_y)
153 Wmv2Context * const w= (Wmv2Context*)s;
154 int cbp, coded_cbp, i;
156 uint8_t *coded_block;
158 ff_msmpeg4_handle_slices(s);
163 for (i = 0; i < 6; i++) {
164 if (s->block_last_index[i] >= 0)
169 ff_wmv2_inter_table[w->cbp_table_index][cbp + 64][1],
170 ff_wmv2_inter_table[w->cbp_table_index][cbp + 64][0]);
172 s->misc_bits += get_bits_diff(s);
174 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
175 ff_msmpeg4_encode_motion(s, motion_x - pred_x,
177 s->mv_bits += get_bits_diff(s);
182 for (i = 0; i < 6; i++) {
184 val = (s->block_last_index[i] >= 1);
185 cbp |= val << (5 - i);
187 /* predict value for close blocks only for luma */
188 pred = ff_msmpeg4_coded_block_pred(s, i, &coded_block);
192 coded_cbp |= val << (5 - i);
195 if (s->pict_type == AV_PICTURE_TYPE_I) {
197 ff_msmp4_mb_i_table[coded_cbp][1], ff_msmp4_mb_i_table[coded_cbp][0]);
200 ff_wmv2_inter_table[w->cbp_table_index][cbp][1],
201 ff_wmv2_inter_table[w->cbp_table_index][cbp][0]);
203 put_bits(&s->pb, 1, 0); /* no AC prediction yet */
204 if(s->inter_intra_pred){
206 put_bits(&s->pb, ff_table_inter_intra[s->h263_aic_dir][1], ff_table_inter_intra[s->h263_aic_dir][0]);
208 s->misc_bits += get_bits_diff(s);
211 for (i = 0; i < 6; i++) {
212 ff_msmpeg4_encode_block(s, block[i], i);
215 s->i_tex_bits += get_bits_diff(s);
217 s->p_tex_bits += get_bits_diff(s);
220 AVCodec ff_wmv2_encoder = {
222 .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"),
223 .type = AVMEDIA_TYPE_VIDEO,
224 .id = AV_CODEC_ID_WMV2,
225 .priv_data_size = sizeof(Wmv2Context),
226 .init = wmv2_encode_init,
227 .encode2 = ff_MPV_encode_picture,
228 .close = ff_MPV_encode_end,
229 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },