yading@10: /*
yading@10:  * Copyright (c) 2002 The FFmpeg Project
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: #include "avcodec.h"
yading@10: #include "mpegvideo.h"
yading@10: #include "msmpeg4.h"
yading@10: #include "msmpeg4data.h"
yading@10: #include "h263.h"
yading@10: #include "wmv2.h"
yading@10: 
yading@10: 
yading@10: static int encode_ext_header(Wmv2Context *w){
yading@10:     MpegEncContext * const s= &w->s;
yading@10:     PutBitContext pb;
yading@10:     int code;
yading@10: 
yading@10:     init_put_bits(&pb, s->avctx->extradata, s->avctx->extradata_size);
yading@10: 
yading@10:     put_bits(&pb, 5, s->avctx->time_base.den / s->avctx->time_base.num); //yes 29.97 -> 29
yading@10:     put_bits(&pb, 11, FFMIN(s->bit_rate/1024, 2047));
yading@10: 
yading@10:     put_bits(&pb, 1, w->mspel_bit=1);
yading@10:     put_bits(&pb, 1, s->loop_filter);
yading@10:     put_bits(&pb, 1, w->abt_flag=1);
yading@10:     put_bits(&pb, 1, w->j_type_bit=1);
yading@10:     put_bits(&pb, 1, w->top_left_mv_flag=0);
yading@10:     put_bits(&pb, 1, w->per_mb_rl_bit=1);
yading@10:     put_bits(&pb, 3, code=1);
yading@10: 
yading@10:     flush_put_bits(&pb);
yading@10: 
yading@10:     s->slice_height = s->mb_height / code;
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static av_cold int wmv2_encode_init(AVCodecContext *avctx){
yading@10:     Wmv2Context * const w= avctx->priv_data;
yading@10: 
yading@10:     if(ff_MPV_encode_init(avctx) < 0)
yading@10:         return -1;
yading@10: 
yading@10:     ff_wmv2_common_init(w);
yading@10: 
yading@10:     avctx->extradata_size= 4;
yading@10:     avctx->extradata= av_mallocz(avctx->extradata_size + 10);
yading@10:     encode_ext_header(w);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number)
yading@10: {
yading@10:     Wmv2Context * const w= (Wmv2Context*)s;
yading@10: 
yading@10:     put_bits(&s->pb, 1, s->pict_type - 1);
yading@10:     if(s->pict_type == AV_PICTURE_TYPE_I){
yading@10:         put_bits(&s->pb, 7, 0);
yading@10:     }
yading@10:     put_bits(&s->pb, 5, s->qscale);
yading@10: 
yading@10:     s->dc_table_index = 1;
yading@10:     s->mv_table_index = 1; /* only if P frame */
yading@10:     s->per_mb_rl_table = 0;
yading@10:     s->mspel= 0;
yading@10:     w->per_mb_abt=0;
yading@10:     w->abt_type=0;
yading@10:     w->j_type=0;
yading@10: 
yading@10:     av_assert0(s->flipflop_rounding);
yading@10: 
yading@10:     if (s->pict_type == AV_PICTURE_TYPE_I) {
yading@10:         av_assert0(s->no_rounding==1);
yading@10:         if(w->j_type_bit) put_bits(&s->pb, 1, w->j_type);
yading@10: 
yading@10:         if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table);
yading@10: 
yading@10:         if(!s->per_mb_rl_table){
yading@10:             ff_msmpeg4_code012(&s->pb, s->rl_chroma_table_index);
yading@10:             ff_msmpeg4_code012(&s->pb, s->rl_table_index);
yading@10:         }
yading@10: 
yading@10:         put_bits(&s->pb, 1, s->dc_table_index);
yading@10: 
yading@10:         s->inter_intra_pred= 0;
yading@10:     }else{
yading@10:         int cbp_index;
yading@10: 
yading@10:         put_bits(&s->pb, 2, SKIP_TYPE_NONE);
yading@10: 
yading@10:         ff_msmpeg4_code012(&s->pb, cbp_index=0);
yading@10:         if(s->qscale <= 10){
yading@10:             int map[3]= {0,2,1};
yading@10:             w->cbp_table_index= map[cbp_index];
yading@10:         }else if(s->qscale <= 20){
yading@10:             int map[3]= {1,0,2};
yading@10:             w->cbp_table_index= map[cbp_index];
yading@10:         }else{
yading@10:             int map[3]= {2,1,0};
yading@10:             w->cbp_table_index= map[cbp_index];
yading@10:         }
yading@10: 
yading@10:         if(w->mspel_bit) put_bits(&s->pb, 1, s->mspel);
yading@10: 
yading@10:         if(w->abt_flag){
yading@10:             put_bits(&s->pb, 1, w->per_mb_abt^1);
yading@10:             if(!w->per_mb_abt){
yading@10:                 ff_msmpeg4_code012(&s->pb, w->abt_type);
yading@10:             }
yading@10:         }
yading@10: 
yading@10:         if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table);
yading@10: 
yading@10:         if(!s->per_mb_rl_table){
yading@10:             ff_msmpeg4_code012(&s->pb, s->rl_table_index);
yading@10:             s->rl_chroma_table_index = s->rl_table_index;
yading@10:         }
yading@10:         put_bits(&s->pb, 1, s->dc_table_index);
yading@10:         put_bits(&s->pb, 1, s->mv_table_index);
yading@10: 
yading@10:         s->inter_intra_pred= 0;//(s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
yading@10:     }
yading@10:     s->esc3_level_length= 0;
yading@10:     s->esc3_run_length= 0;
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: /* Nearly identical to wmv1 but that is just because we do not use the
yading@10:  * useless M$ crap features. It is duplicated here in case someone wants
yading@10:  * to add support for these crap features. */
yading@10: void ff_wmv2_encode_mb(MpegEncContext * s,
yading@10:                        int16_t block[6][64],
yading@10:                        int motion_x, int motion_y)
yading@10: {
yading@10:     Wmv2Context * const w= (Wmv2Context*)s;
yading@10:     int cbp, coded_cbp, i;
yading@10:     int pred_x, pred_y;
yading@10:     uint8_t *coded_block;
yading@10: 
yading@10:     ff_msmpeg4_handle_slices(s);
yading@10: 
yading@10:     if (!s->mb_intra) {
yading@10:         /* compute cbp */
yading@10:         cbp = 0;
yading@10:         for (i = 0; i < 6; i++) {
yading@10:             if (s->block_last_index[i] >= 0)
yading@10:                 cbp |= 1 << (5 - i);
yading@10:         }
yading@10: 
yading@10:         put_bits(&s->pb,
yading@10:                  ff_wmv2_inter_table[w->cbp_table_index][cbp + 64][1],
yading@10:                  ff_wmv2_inter_table[w->cbp_table_index][cbp + 64][0]);
yading@10: 
yading@10:         /* motion vector */
yading@10:         ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
yading@10:         ff_msmpeg4_encode_motion(s, motion_x - pred_x,
yading@10:                               motion_y - pred_y);
yading@10:     } else {
yading@10:         /* compute cbp */
yading@10:         cbp = 0;
yading@10:         coded_cbp = 0;
yading@10:         for (i = 0; i < 6; i++) {
yading@10:             int val, pred;
yading@10:             val = (s->block_last_index[i] >= 1);
yading@10:             cbp |= val << (5 - i);
yading@10:             if (i < 4) {
yading@10:                 /* predict value for close blocks only for luma */
yading@10:                 pred = ff_msmpeg4_coded_block_pred(s, i, &coded_block);
yading@10:                 *coded_block = val;
yading@10:                 val = val ^ pred;
yading@10:             }
yading@10:             coded_cbp |= val << (5 - i);
yading@10:         }
yading@10: 
yading@10:         if (s->pict_type == AV_PICTURE_TYPE_I) {
yading@10:             put_bits(&s->pb,
yading@10:                      ff_msmp4_mb_i_table[coded_cbp][1], ff_msmp4_mb_i_table[coded_cbp][0]);
yading@10:         } else {
yading@10:             put_bits(&s->pb,
yading@10:                      ff_wmv2_inter_table[w->cbp_table_index][cbp][1],
yading@10:                      ff_wmv2_inter_table[w->cbp_table_index][cbp][0]);
yading@10:         }
yading@10:         put_bits(&s->pb, 1, 0);         /* no AC prediction yet */
yading@10:         if(s->inter_intra_pred){
yading@10:             s->h263_aic_dir=0;
yading@10:             put_bits(&s->pb, ff_table_inter_intra[s->h263_aic_dir][1], ff_table_inter_intra[s->h263_aic_dir][0]);
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     for (i = 0; i < 6; i++) {
yading@10:         ff_msmpeg4_encode_block(s, block[i], i);
yading@10:     }
yading@10: }
yading@10: 
yading@10: AVCodec ff_wmv2_encoder = {
yading@10:     .name           = "wmv2",
yading@10:     .type           = AVMEDIA_TYPE_VIDEO,
yading@10:     .id             = AV_CODEC_ID_WMV2,
yading@10:     .priv_data_size = sizeof(Wmv2Context),
yading@10:     .init           = wmv2_encode_init,
yading@10:     .encode2        = ff_MPV_encode_picture,
yading@10:     .close          = ff_MPV_encode_end,
yading@10:     .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
yading@10:     .long_name      = NULL_IF_CONFIG_SMALL("Windows Media Video 8"),
yading@10: };