static int msmpeg4v12_decode_mb(MpegEncContext *s, int16_t block[6][64]) { int cbp, code, i; uint32_t * const mb_type_ptr = &s->current_picture.mb_type[s->mb_x + s->mb_y*s->mb_stride]; if (s->pict_type == AV_PICTURE_TYPE_P) { if (s->use_skip_mb_code) { if (get_bits1(&s->gb)) { /* 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; *mb_type_ptr = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16; return 0; } } if(s->msmpeg4_version==2) code = get_vlc2(&s->gb, v2_mb_type_vlc.table, V2_MB_TYPE_VLC_BITS, 1); else code = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2); if(code<0 || code>7){ av_log(s->avctx, AV_LOG_ERROR, "cbpc %d invalid at %d %d\n", code, s->mb_x, s->mb_y); return -1; } s->mb_intra = code >>2; cbp = code & 0x3; } else { s->mb_intra = 1; if(s->msmpeg4_version==2) cbp= get_vlc2(&s->gb, v2_intra_cbpc_vlc.table, V2_INTRA_CBPC_VLC_BITS, 1); else cbp= get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 1); if(cbp<0 || cbp>3){ av_log(s->avctx, AV_LOG_ERROR, "cbpc %d invalid at %d %d\n", cbp, s->mb_x, s->mb_y); return -1; } } if (!s->mb_intra) { int mx, my, cbpy; cbpy= get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); if(cbpy<0){ av_log(s->avctx, AV_LOG_ERROR, "cbpy %d invalid at %d %d\n", cbp, s->mb_x, s->mb_y); return -1; } cbp|= cbpy<<2; if(s->msmpeg4_version==1 || (cbp&3) != 3) cbp^= 0x3C; ff_h263_pred_motion(s, 0, 0, &mx, &my); mx= msmpeg4v2_decode_motion(s, mx, 1); my= msmpeg4v2_decode_motion(s, my, 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; *mb_type_ptr = MB_TYPE_L0 | MB_TYPE_16x16; } else { if(s->msmpeg4_version==2){ s->ac_pred = get_bits1(&s->gb); cbp|= get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1)<<2; //FIXME check errors } else{ s->ac_pred = 0; cbp|= get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1)<<2; //FIXME check errors if(s->pict_type==AV_PICTURE_TYPE_P) cbp^=0x3C; } *mb_type_ptr = MB_TYPE_INTRA; } s->bdsp.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 block: %d x %d (%d)\n", s->mb_x, s->mb_y, i); return -1; } } return 0; }