/* * Copyright (c) 2002 The Libav Project * * This file is part of Libav. * * Libav is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * Libav is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "avcodec.h" #include "dsputil.h" #include "mpegvideo.h" #include "h263.h" #include "mathops.h" #include "msmpeg4.h" #include "msmpeg4data.h" #include "intrax8.h" #include "wmv2.h" static void parse_mb_skip(Wmv2Context * w){ int mb_x, mb_y; MpegEncContext * const s= &w->s; uint32_t * const mb_type= s->current_picture_ptr->mb_type; w->skip_type= get_bits(&s->gb, 2); switch(w->skip_type){ case SKIP_TYPE_NONE: for(mb_y=0; mb_y<s->mb_height; mb_y++){ for(mb_x=0; mb_x<s->mb_width; mb_x++){ mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_16x16 | MB_TYPE_L0; } } break; case SKIP_TYPE_MPEG: for(mb_y=0; mb_y<s->mb_height; mb_y++){ for(mb_x=0; mb_x<s->mb_width; mb_x++){ mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0; } } break; case SKIP_TYPE_ROW: for(mb_y=0; mb_y<s->mb_height; mb_y++){ if(get_bits1(&s->gb)){ for(mb_x=0; mb_x<s->mb_width; mb_x++){ mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; } }else{ for(mb_x=0; mb_x<s->mb_width; mb_x++){ mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0; } } } break; case SKIP_TYPE_COL: for(mb_x=0; mb_x<s->mb_width; mb_x++){ if(get_bits1(&s->gb)){ for(mb_y=0; mb_y<s->mb_height; mb_y++){ mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; } }else{ for(mb_y=0; mb_y<s->mb_height; mb_y++){ mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0; } } } break; } } static int decode_ext_header(Wmv2Context *w){ MpegEncContext * const s= &w->s; GetBitContext gb; int fps; int code; if(s->avctx->extradata_size<4) return -1; init_get_bits(&gb, s->avctx->extradata, 32); fps = get_bits(&gb, 5); s->bit_rate = get_bits(&gb, 11)*1024; w->mspel_bit = get_bits1(&gb); s->loop_filter = get_bits1(&gb); w->abt_flag = get_bits1(&gb); w->j_type_bit = get_bits1(&gb); w->top_left_mv_flag= get_bits1(&gb); w->per_mb_rl_bit = get_bits1(&gb); code = get_bits(&gb, 3); if(code==0) return -1; s->slice_height = s->mb_height / code; if(s->avctx->debug&FF_DEBUG_PICT_INFO){ 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", 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, code); } return 0; } int ff_wmv2_decode_picture_header(MpegEncContext * s) { Wmv2Context * const w= (Wmv2Context*)s; int code; if(s->picture_number==0) decode_ext_header(w); s->pict_type = get_bits1(&s->gb) + 1; if(s->pict_type == AV_PICTURE_TYPE_I){ code = get_bits(&s->gb, 7); av_log(s->avctx, AV_LOG_DEBUG, "I7:%X/\n", code); } s->chroma_qscale= s->qscale = get_bits(&s->gb, 5); if(s->qscale <= 0) return -1; return 0; } int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s) { Wmv2Context * const w= (Wmv2Context*)s; if (s->pict_type == AV_PICTURE_TYPE_I) { if(w->j_type_bit) w->j_type= get_bits1(&s->gb); else w->j_type= 0; //FIXME check if(!w->j_type){ if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb); else s->per_mb_rl_table= 0; if(!s->per_mb_rl_table){ s->rl_chroma_table_index = decode012(&s->gb); s->rl_table_index = decode012(&s->gb); } s->dc_table_index = get_bits1(&s->gb); } s->inter_intra_pred= 0; s->no_rounding = 1; if(s->avctx->debug&FF_DEBUG_PICT_INFO){ av_log(s->avctx, AV_LOG_DEBUG, "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d j_type:%d \n", s->qscale, s->rl_chroma_table_index, s->rl_table_index, s->dc_table_index, s->per_mb_rl_table, w->j_type); } }else{ int cbp_index; w->j_type=0; parse_mb_skip(w); cbp_index= decode012(&s->gb); if(s->qscale <= 10){ int map[3]= {0,2,1}; w->cbp_table_index= map[cbp_index]; }else if(s->qscale <= 20){ int map[3]= {1,0,2}; w->cbp_table_index= map[cbp_index]; }else{ int map[3]= {2,1,0}; w->cbp_table_index= map[cbp_index]; } if(w->mspel_bit) s->mspel= get_bits1(&s->gb); else s->mspel= 0; //FIXME check if(w->abt_flag){ w->per_mb_abt= get_bits1(&s->gb)^1; if(!w->per_mb_abt){ w->abt_type= decode012(&s->gb); } } if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb); else s->per_mb_rl_table= 0; if(!s->per_mb_rl_table){ s->rl_table_index = decode012(&s->gb); s->rl_chroma_table_index = s->rl_table_index; } s->dc_table_index = get_bits1(&s->gb); s->mv_table_index = get_bits1(&s->gb); s->inter_intra_pred= 0;//(s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE); s->no_rounding ^= 1; if(s->avctx->debug&FF_DEBUG_PICT_INFO){ 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", s->rl_table_index, s->rl_chroma_table_index, s->dc_table_index, s->mv_table_index, s->per_mb_rl_table, s->qscale, s->mspel, w->per_mb_abt, w->abt_type, w->cbp_table_index, s->inter_intra_pred); } } s->esc3_level_length= 0; s->esc3_run_length= 0; s->picture_number++; //FIXME ? if(w->j_type){ ff_intrax8_decode_picture(&w->x8, 2*s->qscale, (s->qscale-1)|1 ); return 1; } return 0; } static inline int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr){ MpegEncContext * const s= &w->s; int ret; ret= ff_msmpeg4_decode_motion(s, mx_ptr, my_ptr); if(ret<0) return -1; if((((*mx_ptr)|(*my_ptr)) & 1) && s->mspel) w->hshift= get_bits1(&s->gb); else w->hshift= 0; //printf("%d %d ", *mx_ptr, *my_ptr); return 0; } static int16_t *wmv2_pred_motion(Wmv2Context *w, int *px, int *py){ MpegEncContext * const s= &w->s; int xy, wrap, diff, type; int16_t *A, *B, *C, *mot_val; wrap = s->b8_stride; xy = s->block_index[0]; mot_val = s->current_picture.motion_val[0][xy]; A = s->current_picture.motion_val[0][xy - 1]; B = s->current_picture.motion_val[0][xy - wrap]; C = s->current_picture.motion_val[0][xy + 2 - wrap]; if(s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag) diff= FFMAX(FFABS(A[0] - B[0]), FFABS(A[1] - B[1])); else diff=0; if(diff >= 8) type= get_bits1(&s->gb); else type= 2; if(type == 0){ *px= A[0]; *py= A[1]; }else if(type == 1){ *px= B[0]; *py= B[1]; }else{ /* special case for first (slice) line */ if (s->first_slice_line) { *px = A[0]; *py = A[1]; } else { *px = mid_pred(A[0], B[0], C[0]); *py = mid_pred(A[1], B[1], C[1]); } } return mot_val; } static inline int wmv2_decode_inter_block(Wmv2Context *w, DCTELEM *block, int n, int cbp){ MpegEncContext * const s= &w->s; static const int sub_cbp_table[3]= {2,3,1}; int sub_cbp; if(!cbp){ s->block_last_index[n] = -1; return 0; } if(w->per_block_abt) w->abt_type= decode012(&s->gb); w->abt_type_table[n]= w->abt_type; if(w->abt_type){ // const uint8_t *scantable= w->abt_scantable[w->abt_type-1].permutated; const uint8_t *scantable= w->abt_scantable[w->abt_type-1].scantable; // const uint8_t *scantable= w->abt_type-1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable; sub_cbp= sub_cbp_table[ decode012(&s->gb) ]; // printf("S%d", sub_cbp); if(sub_cbp&1){ if (ff_msmpeg4_decode_block(s, block, n, 1, scantable) < 0) return -1; } if(sub_cbp&2){ if (ff_msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable) < 0) return -1; } s->block_last_index[n] = 63; return 0; }else{ return ff_msmpeg4_decode_block(s, block, n, 1, s->inter_scantable.permutated); } } int ff_wmv2_decode_mb(MpegEncContext *s, DCTELEM block[6][64]) { Wmv2Context * const w= (Wmv2Context*)s; int cbp, code, i; uint8_t *coded_val; if(w->j_type) return 0; if (s->pict_type == AV_PICTURE_TYPE_P) { if(IS_SKIP(s->current_picture.mb_type[s->mb_y * s->mb_stride + s->mb_x])){ /* skip mb */ s->mb_intra = 0; for(i=0;i<6;i++) s->block_last_index[i] = -1; s->mv_dir = MV_DIR_FORWARD; s->mv_type = MV_TYPE_16X16; s->mv[0][0][0] = 0; s->mv[0][0][1] = 0; s->mb_skipped = 1; w->hshift=0; return 0; } code = get_vlc2(&s->gb, ff_mb_non_intra_vlc[w->cbp_table_index].table, MB_NON_INTRA_VLC_BITS, 3); if (code < 0) return -1; s->mb_intra = (~code & 0x40) >> 6; cbp = code & 0x3f; } else { s->mb_intra = 1; code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2); if (code < 0){ av_log(s->avctx, AV_LOG_ERROR, "II-cbp illegal at %d %d\n", s->mb_x, s->mb_y); return -1; } /* predict coded block pattern */ cbp = 0; for(i=0;i<6;i++) { int val = ((code >> (5 - i)) & 1); if (i < 4) { int pred = ff_msmpeg4_coded_block_pred(s, i, &coded_val); val = val ^ pred; *coded_val = val; } cbp |= val << (5 - i); } } if (!s->mb_intra) { int mx, my; //printf("P at %d %d\n", s->mb_x, s->mb_y); wmv2_pred_motion(w, &mx, &my); if(cbp){ s->dsp.clear_blocks(s->block[0]); if(s->per_mb_rl_table){ s->rl_table_index = decode012(&s->gb); s->rl_chroma_table_index = s->rl_table_index; } if(w->abt_flag && w->per_mb_abt){ w->per_block_abt= get_bits1(&s->gb); if(!w->per_block_abt) w->abt_type= decode012(&s->gb); }else w->per_block_abt=0; } if (wmv2_decode_motion(w, &mx, &my) < 0) return -1; s->mv_dir = MV_DIR_FORWARD; s->mv_type = MV_TYPE_16X16; s->mv[0][0][0] = mx; s->mv[0][0][1] = my; for (i = 0; i < 6; i++) { if (wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1) < 0) { av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding inter block: %d x %d (%d)\n", s->mb_x, s->mb_y, i); return -1; } } } else { //if(s->pict_type==AV_PICTURE_TYPE_P) // printf("%d%d ", s->inter_intra_pred, cbp); //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)); s->ac_pred = get_bits1(&s->gb); if(s->inter_intra_pred){ s->h263_aic_dir= get_vlc2(&s->gb, ff_inter_intra_vlc.table, INTER_INTRA_VLC_BITS, 1); // printf("%d%d %d %d/", s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y); } if(s->per_mb_rl_table && cbp){ s->rl_table_index = decode012(&s->gb); s->rl_chroma_table_index = s->rl_table_index; } s->dsp.clear_blocks(s->block[0]); for (i = 0; i < 6; i++) { if (ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0) { av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding intra block: %d x %d (%d)\n", s->mb_x, s->mb_y, i); return -1; } } } return 0; } static av_cold int wmv2_decode_init(AVCodecContext *avctx){ Wmv2Context * const w= avctx->priv_data; if(avctx->idct_algo==FF_IDCT_AUTO){ avctx->idct_algo=FF_IDCT_WMV2; } if(ff_msmpeg4_decode_init(avctx) < 0) return -1; ff_wmv2_common_init(w); ff_intrax8_common_init(&w->x8,&w->s); return 0; } static av_cold int wmv2_decode_end(AVCodecContext *avctx) { Wmv2Context *w = avctx->priv_data; ff_intrax8_common_end(&w->x8); return ff_h263_decode_end(avctx); } AVCodec ff_wmv2_decoder = { "wmv2", AVMEDIA_TYPE_VIDEO, CODEC_ID_WMV2, sizeof(Wmv2Context), wmv2_decode_init, NULL, wmv2_decode_end, ff_h263_decode_frame, CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1, .max_lowres = 3, .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"), .pix_fmts= ff_pixfmt_list_420, };