static int vc1_decode_p_block(VC1Context *v, DCTELEM block[64], int n, int mquant, int ttmb, int first_block, uint8_t *dst, int linesize, int skip_block) { MpegEncContext *s = &v->s; GetBitContext *gb = &s->gb; int i, j; int subblkpat = 0; int scale, off, idx, last, skip, value; int ttblk = ttmb & 7; if(ttmb == -1) { ttblk = ff_vc1_ttblk_to_tt[v->tt_index][get_vlc2(gb, ff_vc1_ttblk_vlc[v->tt_index].table, VC1_TTBLK_VLC_BITS, 1)]; } if(ttblk == TT_4X4) { subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1); } if((ttblk != TT_8X8 && ttblk != TT_4X4) && (v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))) { subblkpat = decode012(gb); if(subblkpat) subblkpat ^= 3; //swap decoded pattern bits if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) ttblk = TT_8X4; if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) ttblk = TT_4X8; } scale = 2 * mquant + ((v->pq == mquant) ? v->halfpq : 0); // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) { subblkpat = 2 - (ttblk == TT_8X4_TOP); ttblk = TT_8X4; } if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) { subblkpat = 2 - (ttblk == TT_4X8_LEFT); ttblk = TT_4X8; } switch(ttblk) { case TT_8X8: i = 0; last = 0; while (!last) { vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2); i += skip; if(i > 63) break; idx = wmv1_scantable[0][i++]; block[idx] = value * scale; if(!v->pquantizer) block[idx] += (block[idx] < 0) ? -mquant : mquant; } if(!skip_block){ s->dsp.vc1_inv_trans_8x8(block); s->dsp.add_pixels_clamped(block, dst, linesize); } break; case TT_4X4: for(j = 0; j < 4; j++) { last = subblkpat & (1 << (3 - j)); i = 0; off = (j & 1) * 4 + (j & 2) * 16; while (!last) { vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2); i += skip; if(i > 15) break; idx = ff_vc1_simple_progressive_4x4_zz[i++]; block[idx + off] = value * scale; if(!v->pquantizer) block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant; } if(!(subblkpat & (1 << (3 - j))) && !skip_block) s->dsp.vc1_inv_trans_4x4(dst + (j&1)*4 + (j&2)*2*linesize, linesize, block + off); } break; case TT_8X4: for(j = 0; j < 2; j++) { last = subblkpat & (1 << (1 - j)); i = 0; off = j * 32; while (!last) { vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2); i += skip; if(i > 31) break; idx = v->zz_8x4[i++]+off; block[idx] = value * scale; if(!v->pquantizer) block[idx] += (block[idx] < 0) ? -mquant : mquant; } if(!(subblkpat & (1 << (1 - j))) && !skip_block) s->dsp.vc1_inv_trans_8x4(dst + j*4*linesize, linesize, block + off); } break; case TT_4X8: for(j = 0; j < 2; j++) { last = subblkpat & (1 << (1 - j)); i = 0; off = j * 4; while (!last) { vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2); i += skip; if(i > 31) break; idx = v->zz_4x8[i++]+off; block[idx] = value * scale; if(!v->pquantizer) block[idx] += (block[idx] < 0) ? -mquant : mquant; } if(!(subblkpat & (1 << (1 - j))) && !skip_block) s->dsp.vc1_inv_trans_4x8(dst + j*4, linesize, block + off); } break; } return 0; }
static int vc1_decode_p_block(VC1Context *v, DCTELEM block[64], int n, int mquant, int ttmb, int first_block, uint8_t *dst, int linesize, int skip_block) { MpegEncContext *s = &v->s; GetBitContext *gb = &s->gb; int i, j; int subblkpat = 0; int scale, off, idx, last, skip, value; int ttblk = ttmb & 7; if(ttmb == -1) { ttblk = ff_vc1_ttblk_to_tt[v->tt_index][get_vlc2(gb, ff_vc1_ttblk_vlc[v->tt_index].table, VC1_TTBLK_VLC_BITS, 1)]; } if(ttblk == TT_4X4) { subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1); } if((ttblk != TT_8X8 && ttblk != TT_4X4) && (v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))) { subblkpat = decode012(gb); if(subblkpat) subblkpat ^= 3;  