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* Copyright (c) 2002 The FFmpeg Project
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* This file is part of FFmpeg.
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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#include "mpegvideo.h"
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#include "msmpeg4data.h"
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static void parse_mb_skip(Wmv2Context * w){
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MpegEncContext * const s= &w->s;
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uint32_t * const mb_type= s->current_picture_ptr->mb_type;
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w->skip_type= get_bits(&s->gb, 2);
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for(mb_y=0; mb_y<s->mb_height; mb_y++){
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for(mb_x=0; mb_x<s->mb_width; mb_x++){
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mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_16x16 | MB_TYPE_L0;
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for(mb_y=0; mb_y<s->mb_height; mb_y++){
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for(mb_x=0; mb_x<s->mb_width; mb_x++){
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mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
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for(mb_y=0; mb_y<s->mb_height; mb_y++){
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if(get_bits1(&s->gb)){
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for(mb_x=0; mb_x<s->mb_width; mb_x++){
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mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
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for(mb_x=0; mb_x<s->mb_width; mb_x++){
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mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
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for(mb_x=0; mb_x<s->mb_width; mb_x++){
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if(get_bits1(&s->gb)){
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for(mb_y=0; mb_y<s->mb_height; mb_y++){
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mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
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for(mb_y=0; mb_y<s->mb_height; mb_y++){
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mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
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static int decode_ext_header(Wmv2Context *w){
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MpegEncContext * const s= &w->s;
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if(s->avctx->extradata_size<4) return -1;
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init_get_bits(&gb, s->avctx->extradata, s->avctx->extradata_size*8);
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fps = get_bits(&gb, 5);
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s->bit_rate = get_bits(&gb, 11)*1024;
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w->mspel_bit = get_bits1(&gb);
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s->loop_filter = get_bits1(&gb);
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w->abt_flag = get_bits1(&gb);
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w->j_type_bit = get_bits1(&gb);
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w->top_left_mv_flag= get_bits1(&gb);
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w->per_mb_rl_bit = get_bits1(&gb);
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code = get_bits(&gb, 3);
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if(code==0) return -1;
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s->slice_height = s->mb_height / code;
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if(s->avctx->debug&FF_DEBUG_PICT_INFO){
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av_log(s->avctx, AV_LOG_DEBUG, "fps:%d, br:%d, qpbit:%d, abt_flag:%d, j_type_bit:%d, tl_mv_flag:%d, mbrl_bit:%d, code:%d, loop_filter:%d, slices:%d\n",
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fps, s->bit_rate, w->mspel_bit, w->abt_flag, w->j_type_bit, w->top_left_mv_flag, w->per_mb_rl_bit, code, s->loop_filter,
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int ff_wmv2_decode_picture_header(MpegEncContext * s)
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Wmv2Context * const w= (Wmv2Context*)s;
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for(i=0; i<s->gb.size*8; i++)
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printf("%d", get_bits1(&s->gb));
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// get_bits1(&s->gb);
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if(s->picture_number==0)
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decode_ext_header(w);
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s->pict_type = get_bits1(&s->gb) + 1;
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if(s->pict_type == FF_I_TYPE){
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code = get_bits(&s->gb, 7);
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av_log(s->avctx, AV_LOG_DEBUG, "I7:%X/\n", code);
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s->chroma_qscale= s->qscale = get_bits(&s->gb, 5);
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int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s)
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Wmv2Context * const w= (Wmv2Context*)s;
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if (s->pict_type == FF_I_TYPE) {
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if(w->j_type_bit) w->j_type= get_bits1(&s->gb);
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else w->j_type= 0; //FIXME check
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if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb);
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else s->per_mb_rl_table= 0;
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if(!s->per_mb_rl_table){
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s->rl_chroma_table_index = decode012(&s->gb);
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s->rl_table_index = decode012(&s->gb);
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s->dc_table_index = get_bits1(&s->gb);
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s->inter_intra_pred= 0;
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if(s->avctx->debug&FF_DEBUG_PICT_INFO){
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av_log(s->avctx, AV_LOG_DEBUG, "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d j_type:%d \n",
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s->rl_chroma_table_index,
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cbp_index= decode012(&s->gb);
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w->cbp_table_index= map[cbp_index];
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}else if(s->qscale <= 20){
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w->cbp_table_index= map[cbp_index];
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w->cbp_table_index= map[cbp_index];
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if(w->mspel_bit) s->mspel= get_bits1(&s->gb);
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else s->mspel= 0; //FIXME check
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w->per_mb_abt= get_bits1(&s->gb)^1;
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w->abt_type= decode012(&s->gb);
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if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb);
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else s->per_mb_rl_table= 0;
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if(!s->per_mb_rl_table){
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s->rl_table_index = decode012(&s->gb);
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s->rl_chroma_table_index = s->rl_table_index;
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s->dc_table_index = get_bits1(&s->gb);
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s->mv_table_index = get_bits1(&s->gb);
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s->inter_intra_pred= 0;//(s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
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if(s->avctx->debug&FF_DEBUG_PICT_INFO){
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av_log(s->avctx, AV_LOG_DEBUG, "rl:%d rlc:%d dc:%d mv:%d mbrl:%d qp:%d mspel:%d per_mb_abt:%d abt_type:%d cbp:%d ii:%d\n",
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s->rl_chroma_table_index,
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s->inter_intra_pred);
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s->esc3_level_length= 0;
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s->esc3_run_length= 0;
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s->picture_number++; //FIXME ?
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ff_intrax8_decode_picture(&w->x8, 2*s->qscale, (s->qscale-1)|1 );
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static inline int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr){
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MpegEncContext * const s= &w->s;
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ret= ff_msmpeg4_decode_motion(s, mx_ptr, my_ptr);
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if((((*mx_ptr)|(*my_ptr)) & 1) && s->mspel)
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w->hshift= get_bits1(&s->gb);
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//printf("%d %d ", *mx_ptr, *my_ptr);
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static int16_t *wmv2_pred_motion(Wmv2Context *w, int *px, int *py){
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MpegEncContext * const s= &w->s;
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int xy, wrap, diff, type;
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int16_t *A, *B, *C, *mot_val;
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xy = s->block_index[0];
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mot_val = s->current_picture.motion_val[0][xy];
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A = s->current_picture.motion_val[0][xy - 1];
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B = s->current_picture.motion_val[0][xy - wrap];
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C = s->current_picture.motion_val[0][xy + 2 - wrap];
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if(s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag)
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diff= FFMAX(FFABS(A[0] - B[0]), FFABS(A[1] - B[1]));
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type= get_bits1(&s->gb);
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/* special case for first (slice) line */
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if (s->first_slice_line) {
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*px = mid_pred(A[0], B[0], C[0]);
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*py = mid_pred(A[1], B[1], C[1]);
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static inline int wmv2_decode_inter_block(Wmv2Context *w, DCTELEM *block, int n, int cbp){
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MpegEncContext * const s= &w->s;
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static const int sub_cbp_table[3]= {2,3,1};
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s->block_last_index[n] = -1;
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w->abt_type= decode012(&s->gb);
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printf("B%d", w->abt_type);
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w->abt_type_table[n]= w->abt_type;
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// const uint8_t *scantable= w->abt_scantable[w->abt_type-1].permutated;
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const uint8_t *scantable= w->abt_scantable[w->abt_type-1].scantable;
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// const uint8_t *scantable= w->abt_type-1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable;
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sub_cbp= sub_cbp_table[ decode012(&s->gb) ];
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// printf("S%d", sub_cbp);
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if (ff_msmpeg4_decode_block(s, block, n, 1, scantable) < 0)
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if (ff_msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable) < 0)
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s->block_last_index[n] = 63;
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return ff_msmpeg4_decode_block(s, block, n, 1, s->inter_scantable.permutated);
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int ff_wmv2_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
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Wmv2Context * const w= (Wmv2Context*)s;
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if(w->j_type) return 0;
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if (s->pict_type == FF_P_TYPE) {
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if(IS_SKIP(s->current_picture.mb_type[s->mb_y * s->mb_stride + s->mb_x])){
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s->block_last_index[i] = -1;
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s->mv_dir = MV_DIR_FORWARD;
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s->mv_type = MV_TYPE_16X16;
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code = get_vlc2(&s->gb, ff_mb_non_intra_vlc[w->cbp_table_index].table, MB_NON_INTRA_VLC_BITS, 3);
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s->mb_intra = (~code & 0x40) >> 6;
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code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
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av_log(s->avctx, AV_LOG_ERROR, "II-cbp illegal at %d %d\n", s->mb_x, s->mb_y);
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/* predict coded block pattern */
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int val = ((code >> (5 - i)) & 1);
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int pred = ff_msmpeg4_coded_block_pred(s, i, &coded_val);
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cbp |= val << (5 - i);
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//printf("P at %d %d\n", s->mb_x, s->mb_y);
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wmv2_pred_motion(w, &mx, &my);
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s->dsp.clear_blocks(s->block[0]);
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if(s->per_mb_rl_table){
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s->rl_table_index = decode012(&s->gb);
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s->rl_chroma_table_index = s->rl_table_index;
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if(w->abt_flag && w->per_mb_abt){
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w->per_block_abt= get_bits1(&s->gb);
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if(!w->per_block_abt)
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w->abt_type= decode012(&s->gb);
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if (wmv2_decode_motion(w, &mx, &my) < 0)
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s->mv_dir = MV_DIR_FORWARD;
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s->mv_type = MV_TYPE_16X16;
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for (i = 0; i < 6; i++) {
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if (wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1) < 0)
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av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding inter block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
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//if(s->pict_type==FF_P_TYPE)
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// printf("%d%d ", s->inter_intra_pred, cbp);
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//printf("I at %d %d %d %06X\n", s->mb_x, s->mb_y, ((cbp&3)? 1 : 0) +((cbp&0x3C)? 2 : 0), show_bits(&s->gb, 24));
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s->ac_pred = get_bits1(&s->gb);
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if(s->inter_intra_pred){
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s->h263_aic_dir= get_vlc2(&s->gb, ff_inter_intra_vlc.table, INTER_INTRA_VLC_BITS, 1);
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// printf("%d%d %d %d/", s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y);
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if(s->per_mb_rl_table && cbp){
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s->rl_table_index = decode012(&s->gb);
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s->rl_chroma_table_index = s->rl_table_index;
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s->dsp.clear_blocks(s->block[0]);
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for (i = 0; i < 6; i++) {
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if (ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0)
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av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding intra block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
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static av_cold int wmv2_decode_init(AVCodecContext *avctx){
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Wmv2Context * const w= avctx->priv_data;
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if(avctx->idct_algo==FF_IDCT_AUTO){
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avctx->idct_algo=FF_IDCT_WMV2;
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if(ff_msmpeg4_decode_init(avctx) < 0)
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ff_wmv2_common_init(w);
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ff_intrax8_common_init(&w->x8,&w->s);
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static av_cold int wmv2_decode_end(AVCodecContext *avctx)
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Wmv2Context *w = avctx->priv_data;
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ff_intrax8_common_end(&w->x8);
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return ff_h263_decode_end(avctx);
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AVCodec wmv2_decoder = {
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ff_h263_decode_frame,
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CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
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.long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"),
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.pix_fmts= ff_pixfmt_list_420,