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revision 1161, Wed Oct 1 23:23:01 2003 UTC revision 1205, Thu Nov 13 23:11:24 2003 UTC
# Line 20  Line 20 
20   *  along with this program ; if not, write to the Free Software   *  along with this program ; if not, write to the Free Software
21   *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA   *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
22   *   *
23   * $Id: estimation_rd_based.c,v 1.1.2.4 2003-10-01 23:23:01 edgomez Exp $   * $Id: estimation_rd_based.c,v 1.1.2.9 2003-11-13 23:11:24 edgomez Exp $
24   *   *
25   ****************************************************************************/   ****************************************************************************/
26    
# Line 40  Line 40 
40  #include "motion.h"  #include "motion.h"
41  #include "sad.h"  #include "sad.h"
42  #include "../bitstream/zigzag.h"  #include "../bitstream/zigzag.h"
43  #include "../quant/quant_mpeg4.h"  #include "../quant/quant.h"
 #include "../quant/quant_h263.h"  
44  #include "../bitstream/vlc_codes.h"  #include "../bitstream/vlc_codes.h"
45  #include "../dct/fdct.h"  #include "../dct/fdct.h"
46  #include "motion_inlines.h"  #include "motion_inlines.h"
# Line 55  Line 54 
54                                  int16_t * const dqcoeff,                                  int16_t * const dqcoeff,
55                                  const uint32_t quant, const int quant_type,                                  const uint32_t quant, const int quant_type,
56                                  uint32_t * cbp,                                  uint32_t * cbp,
57                                  const int block)                                  const int block,
58                                    const uint16_t * scan_table)
59  {  {
60          int sum;          int sum;
61          int bits;          int bits;
62          int distortion = 0;          int distortion = 0;
         int i;  
63    
64          fdct(data);          fdct(data);
65    
66          if (quant_type) sum = quant_inter(coeff, data, quant);          if (quant_type) sum = quant_h263_inter(coeff, data, quant);
67          else sum = quant4_inter(coeff, data, quant);          else sum = quant_mpeg_inter(coeff, data, quant);
68    
69          if (sum > 0) {          if (sum > 0) {
70                  *cbp |= 1 << (5 - block);                  *cbp |= 1 << (5 - block);
71                  bits = BITS_MULT * CodeCoeffInter_CalcBits(coeff, scan_tables[0]);                  bits = BITS_MULT * CodeCoeffInter_CalcBits(coeff, scan_table);
   
                 if (quant_type) dequant_inter(dqcoeff, coeff, quant);  
                 else dequant4_inter(dqcoeff, coeff, quant);  
72    
73                  for (i = 0; i < 64; i++)                  if (quant_type) dequant_h263_inter(dqcoeff, coeff, quant);
74                          distortion += (data[i] - dqcoeff[i])*(data[i] - dqcoeff[i]);                  else dequant_mpeg_inter(dqcoeff, coeff, quant);
75    
76                    distortion = sse8_16bit(data, dqcoeff, 8*sizeof(int16_t));
77          } else {          } else {
78                    const static int16_t zero_block[64] =
79                            {
80                                    0, 0, 0, 0, 0, 0, 0, 0,
81                                    0, 0, 0, 0, 0, 0, 0, 0,
82                                    0, 0, 0, 0, 0, 0, 0, 0,
83                                    0, 0, 0, 0, 0, 0, 0, 0,
84                                    0, 0, 0, 0, 0, 0, 0, 0,
85                                    0, 0, 0, 0, 0, 0, 0, 0,
86                                    0, 0, 0, 0, 0, 0, 0, 0,
87                                    0, 0, 0, 0, 0, 0, 0, 0,
88                            };
89                  bits = 0;                  bits = 0;
90                  for (i = 0; i < 64; i++)                  distortion = sse8_16bit(data, zero_block, 8*sizeof(int16_t));
                         distortion += data[i]*data[i];  
91          }          }
92    
93    
94          return bits + (LAMBDA*distortion)/(quant*quant);          return bits + (LAMBDA*distortion)/(quant*quant);
95  }  }
96    
97  static __inline unsigned int  static __inline unsigned int
98  Block_CalcBitsIntra(int16_t * const coeff,  Block_CalcBitsIntra(MACROBLOCK * pMB,
99                                          int16_t * const data,                                          const unsigned int x,
100                                          int16_t * const dqcoeff,                                          const unsigned int y,
101                                          const uint32_t quant, const int quant_type,                                          const unsigned int mb_width,
102                                          uint32_t * cbp,                                          const uint32_t block,
103                                          const int block,                                          int16_t coeff[64],
104                                          int * dcpred)                                          int16_t qcoeff[64],
105  {                                          int16_t dqcoeff[64],
106          int bits, i;                                          int16_t predictors[8],
107          int distortion = 0;                                          const uint32_t quant,
108          uint32_t iDcScaler = get_dc_scaler(quant, block < 4);                                          const int quant_type,
109          int b_dc;                                          unsigned int bits[2],
110                                            unsigned int cbp[2])
111    {
112            int direction;
113            int16_t *pCurrent;
114            unsigned int i, coded;
115            unsigned int distortion = 0;
116            const uint32_t iDcScaler = get_dc_scaler(quant, block < 4);
117    
118            fdct(coeff);
119    
120            if (quant_type) {
121                    quant_h263_intra(qcoeff, coeff, quant, iDcScaler);
122                    dequant_h263_intra(dqcoeff, qcoeff, quant, iDcScaler);
123            } else {
124                    quant_mpeg_intra(qcoeff, coeff, quant, iDcScaler);
125                    dequant_mpeg_intra(dqcoeff, qcoeff, quant, iDcScaler);
126            }
127    
128          fdct(data);          predict_acdc(pMB-(x+mb_width*y), x, y, mb_width, block, qcoeff,
129          data[0] -= 1024;                                  quant, iDcScaler, predictors, 0);
130    
131          if (quant_type) quant_intra(coeff, data, quant, iDcScaler);          direction = pMB->acpred_directions[block];
132          else quant4_intra(coeff, data, quant, iDcScaler);          pCurrent = pMB->pred_values[block];
133    
134          b_dc = coeff[0];          /* store current coeffs to pred_values[] for future prediction */
135          if (block < 4) {          pCurrent[0] = qcoeff[0] * iDcScaler;
136                  coeff[0] -= *dcpred;          for (i = 1; i < 8; i++) {
137                  *dcpred = b_dc;                  pCurrent[i] = qcoeff[i];
138                    pCurrent[i + 7] = qcoeff[i * 8];
139          }          }
140    
141          bits = BITS_MULT*CodeCoeffIntra_CalcBits(coeff, scan_tables[0]);          /* dc prediction */
142          if (bits != 0) *cbp |= 1 << (5 - block);          qcoeff[0] = qcoeff[0] - predictors[0];
143    
144          if (block < 4) bits += BITS_MULT*dcy_tab[coeff[0] + 255].len;          if (block < 4) bits[1] = bits[0] = dcy_tab[qcoeff[0] + 255].len;
145          else bits += BITS_MULT*dcc_tab[coeff[0] + 255].len;          else bits[1] = bits[0] = dcc_tab[qcoeff[0] + 255].len;
146    
147          coeff[0] = b_dc;          /* calc cost before ac prediction */
148          if (quant_type) dequant_intra(dqcoeff, coeff, quant, iDcScaler);          bits[0] += coded = CodeCoeffIntra_CalcBits(qcoeff, scan_tables[0]);
149          else dequant4_intra(dqcoeff, coeff, quant, iDcScaler);          if (coded > 0) cbp[0] |= 1 << (5 - block);
150    
151          for (i = 0; i < 64; i++)          /* apply ac prediction & calc cost*/
152                  distortion += (data[i] - dqcoeff[i])*(data[i] - dqcoeff[i]);          if (direction == 1) {
153                    for (i = 1; i < 8; i++) {
154                            qcoeff[i] -= predictors[i];
155                            predictors[i] = qcoeff[i];
156                    }
157            } else {                                                /* acpred_direction == 2 */
158                    for (i = 1; i < 8; i++) {
159                            qcoeff[i*8] -= predictors[i];
160                            predictors[i] = qcoeff[i*8];
161                    }
162            }
163    
164          return bits + (LAMBDA*distortion)/(quant*quant);          bits[1] += coded = CodeCoeffIntra_CalcBits(qcoeff, scan_tables[direction]);
165            if (coded > 0) cbp[1] |= 1 << (5 - block);
166    
167            distortion = sse8_16bit(coeff, dqcoeff, 8*sizeof(int16_t));
168    
169            return (LAMBDA*distortion)/(quant*quant);
170  }  }
171    
172    
173    
174  static void  static void
175  CheckCandidateRD16(const int x, const int y, const SearchData * const data, const unsigned int Direction)  CheckCandidateRD16(const int x, const int y, const SearchData * const data, const unsigned int Direction)
176  {  {
# Line 154  Line 197 
197          for(i = 0; i < 4; i++) {          for(i = 0; i < 4; i++) {
198                  int s = 8*((i&1) + (i>>1)*data->iEdgedWidth);                  int s = 8*((i&1) + (i>>1)*data->iEdgedWidth);
199                  transfer_8to16subro(in, data->Cur + s, ptr + s, data->iEdgedWidth);                  transfer_8to16subro(in, data->Cur + s, ptr + s, data->iEdgedWidth);
200                  rd += data->temp[i] = Block_CalcBits(coeff, in, data->dctSpace + 128, data->iQuant, data->quant_type, &cbp, i);                  rd += data->temp[i] = Block_CalcBits(coeff, in, data->dctSpace + 128, data->iQuant, data->quant_type, &cbp, i, data->scan_table);
201          }          }
202    
203          rd += t = BITS_MULT*d_mv_bits(x, y, data->predMV, data->iFcode, data->qpel^data->qpel_precision, 0);          rd += t = BITS_MULT*d_mv_bits(x, y, data->predMV, data->iFcode, data->qpel^data->qpel_precision, 0);
# Line 179  Line 222 
222          /* chroma U */          /* chroma U */
223          ptr = interpolate8x8_switch2(data->RefQ, data->RefP[4], 0, 0, xc, yc, data->iEdgedWidth/2, data->rounding);          ptr = interpolate8x8_switch2(data->RefQ, data->RefP[4], 0, 0, xc, yc, data->iEdgedWidth/2, data->rounding);
224          transfer_8to16subro(in, data->CurU, ptr, data->iEdgedWidth/2);          transfer_8to16subro(in, data->CurU, ptr, data->iEdgedWidth/2);
225          rd += Block_CalcBits(coeff, in, data->dctSpace + 128, data->iQuant, data->quant_type, &cbp, 4);          rd += Block_CalcBits(coeff, in, data->dctSpace + 128, data->iQuant, data->quant_type, &cbp, 4, data->scan_table);
226          if (rd >= data->iMinSAD[0]) return;          if (rd >= data->iMinSAD[0]) return;
227    
228          /* chroma V */          /* chroma V */
229          ptr = interpolate8x8_switch2(data->RefQ, data->RefP[5], 0, 0, xc, yc, data->iEdgedWidth/2, data->rounding);          ptr = interpolate8x8_switch2(data->RefQ, data->RefP[5], 0, 0, xc, yc, data->iEdgedWidth/2, data->rounding);
230          transfer_8to16subro(in, data->CurV, ptr, data->iEdgedWidth/2);          transfer_8to16subro(in, data->CurV, ptr, data->iEdgedWidth/2);
231          rd += Block_CalcBits(coeff, in, data->dctSpace + 128, data->iQuant, data->quant_type, &cbp, 5);          rd += Block_CalcBits(coeff, in, data->dctSpace + 128, data->iQuant, data->quant_type, &cbp, 5, data->scan_table);
232    
233          rd += BITS_MULT*mcbpc_inter_tab[(MODE_INTER & 7) | ((cbp & 3) << 3)].len;          rd += BITS_MULT*mcbpc_inter_tab[(MODE_INTER & 7) | ((cbp & 3) << 3)].len;
234    
# Line 219  Line 262 
262          }          }
263    
264          transfer_8to16subro(in, data->Cur, ptr, data->iEdgedWidth);          transfer_8to16subro(in, data->Cur, ptr, data->iEdgedWidth);
265          rd = Block_CalcBits(coeff, in, data->dctSpace + 128, data->iQuant, data->quant_type, &cbp, 5);          rd = Block_CalcBits(coeff, in, data->dctSpace + 128, data->iQuant, data->quant_type, &cbp, 5, data->scan_table);
266          rd += BITS_MULT*d_mv_bits(x, y, data->predMV, data->iFcode, data->qpel^data->qpel_precision, 0);          rd += BITS_MULT*d_mv_bits(x, y, data->predMV, data->iFcode, data->qpel^data->qpel_precision, 0);
267    
268          if (rd < data->iMinSAD[0]) {          if (rd < data->iMinSAD[0]) {
# Line 421  Line 464 
464          /* chroma U */          /* chroma U */
465          ptr = interpolate8x8_switch2(Data->RefQ + 64, Data->RefP[4], 0, 0, sumx, sumy, Data->iEdgedWidth/2, Data->rounding);          ptr = interpolate8x8_switch2(Data->RefQ + 64, Data->RefP[4], 0, 0, sumx, sumy, Data->iEdgedWidth/2, Data->rounding);
466          transfer_8to16subro(in, Data->CurU, ptr, Data->iEdgedWidth/2);          transfer_8to16subro(in, Data->CurU, ptr, Data->iEdgedWidth/2);
467          bits += Block_CalcBits(coeff, in, Data->dctSpace + 128, Data->iQuant, Data->quant_type, &cbp, 4);          bits += Block_CalcBits(coeff, in, Data->dctSpace + 128, Data->iQuant, Data->quant_type, &cbp, 4, Data->scan_table);
468    
469          if (bits >= *Data->iMinSAD) return bits;          if (bits >= *Data->iMinSAD) return bits;
470    
471          /* chroma V */          /* chroma V */
472          ptr = interpolate8x8_switch2(Data->RefQ + 64, Data->RefP[5], 0, 0, sumx, sumy, Data->iEdgedWidth/2, Data->rounding);          ptr = interpolate8x8_switch2(Data->RefQ + 64, Data->RefP[5], 0, 0, sumx, sumy, Data->iEdgedWidth/2, Data->rounding);
473          transfer_8to16subro(in, Data->CurV, ptr, Data->iEdgedWidth/2);          transfer_8to16subro(in, Data->CurV, ptr, Data->iEdgedWidth/2);
474          bits += Block_CalcBits(coeff, in, Data->dctSpace + 128, Data->iQuant, Data->quant_type, &cbp, 5);          bits += Block_CalcBits(coeff, in, Data->dctSpace + 128, Data->iQuant, Data->quant_type, &cbp, 5, Data->scan_table);
475    
476          bits += BITS_MULT*mcbpc_inter_tab[(MODE_INTER4V & 7) | ((cbp & 3) << 3)].len;          bits += BITS_MULT*mcbpc_inter_tab[(MODE_INTER4V & 7) | ((cbp & 3) << 3)].len;
477    
# Line 437  Line 480 
480  }  }
481    
482  static int  static int
483  findRD_intra(const SearchData * const Data)  findRD_intra(const SearchData * const Data, MACROBLOCK * pMB,
484                             const int x, const int y, const int mb_width)
485  {  {
486          int bits = BITS_MULT*1; /* this one is ac/dc prediction flag bit */          int cbp[2] = {0, 0}, bits[2], i;
487          int cbp = 0, i, dc = 0;          int bits1 = BITS_MULT*1, bits2 = BITS_MULT*1; /* this one is ac/dc prediction flag bit */
488          int16_t *in = Data->dctSpace, * coeff = Data->dctSpace + 64;          int distortion = 0;
489    
490            int16_t *in = Data->dctSpace, * coeff = Data->dctSpace + 64, * dqcoeff = Data->dctSpace + 128;
491            const uint32_t iQuant = Data->iQuant;
492            int16_t predictors[6][8];
493    
494          for(i = 0; i < 4; i++) {          for(i = 0; i < 4; i++) {
495                  int s = 8*((i&1) + (i>>1)*Data->iEdgedWidth);                  int s = 8*((i&1) + (i>>1)*Data->iEdgedWidth);
496                  transfer_8to16copy(in, Data->Cur + s, Data->iEdgedWidth);                  transfer_8to16copy(in, Data->Cur + s, Data->iEdgedWidth);
                 bits += Block_CalcBitsIntra(coeff, in, Data->dctSpace + 128, Data->iQuant, Data->quant_type, &cbp, i, &dc);  
497    
498                  if (bits >= Data->iMinSAD[0]) return bits;  
499                    distortion = Block_CalcBitsIntra(pMB, x, y, mb_width, i, in, coeff, dqcoeff,
500                                                                    predictors[i], iQuant, Data->quant_type, bits, cbp);
501                    bits1 += distortion + BITS_MULT * bits[0];
502                    bits2 += distortion + BITS_MULT * bits[1];
503    
504                    if (bits1 >= Data->iMinSAD[0] && bits2 >= Data->iMinSAD[0])
505                            return bits1;
506          }          }
507    
508          bits += BITS_MULT*xvid_cbpy_tab[cbp>>2].len;          bits1 += BITS_MULT*xvid_cbpy_tab[cbp[0]>>2].len;
509            bits2 += BITS_MULT*xvid_cbpy_tab[cbp[1]>>2].len;
510    
511          /*chroma U */          /*chroma U */
512          transfer_8to16copy(in, Data->CurU, Data->iEdgedWidth/2);          transfer_8to16copy(in, Data->CurU, Data->iEdgedWidth/2);
513          bits += Block_CalcBitsIntra(coeff, in, Data->dctSpace + 128, Data->iQuant, Data->quant_type, &cbp, 4, &dc);          distortion = Block_CalcBitsIntra(pMB, x, y, mb_width, 4, in, coeff, dqcoeff,
514                                                                            predictors[4], iQuant, Data->quant_type, bits, cbp);
515            bits1 += distortion + BITS_MULT * bits[0];
516            bits2 += distortion + BITS_MULT * bits[1];
517    
518          if (bits >= Data->iMinSAD[0]) return bits;          if (bits1 >= Data->iMinSAD[0] && bits2 >= Data->iMinSAD[0])
519                    return bits1;
520    
521          /* chroma V */          /* chroma V */
522          transfer_8to16copy(in, Data->CurV, Data->iEdgedWidth/2);          transfer_8to16copy(in, Data->CurV, Data->iEdgedWidth/2);
523          bits += Block_CalcBitsIntra(coeff, in, Data->dctSpace + 128, Data->iQuant, Data->quant_type, &cbp, 5, &dc);          distortion = Block_CalcBitsIntra(pMB, x, y, mb_width, 5, in, coeff, dqcoeff,
524                                                                            predictors[5], iQuant, Data->quant_type, bits, cbp);
525    
526          bits += BITS_MULT*mcbpc_inter_tab[(MODE_INTRA & 7) | ((cbp & 3) << 3)].len;          bits1 += distortion + BITS_MULT * bits[0];
527            bits2 += distortion + BITS_MULT * bits[1];
528    
529          return bits;          bits1 += BITS_MULT*mcbpc_inter_tab[(MODE_INTRA & 7) | ((cbp[0] & 3) << 3)].len;
530            bits2 += BITS_MULT*mcbpc_inter_tab[(MODE_INTRA & 7) | ((cbp[1] & 3) << 3)].len;
531    
532            *Data->cbp = bits1 <= bits2 ? cbp[0] : cbp[1];
533    
534            return MIN(bits1, bits2);
535  }  }
536    
537    
538  static int  static int
539  findRD_gmc(const SearchData * const Data, const IMAGE * const vGMC, const int x, const int y)  findRD_gmc(const SearchData * const Data, const IMAGE * const vGMC, const int x, const int y)
540  {  {
# Line 478  Line 545 
545          for(i = 0; i < 4; i++) {          for(i = 0; i < 4; i++) {
546                  int s = 8*((i&1) + (i>>1)*Data->iEdgedWidth);                  int s = 8*((i&1) + (i>>1)*Data->iEdgedWidth);
547                  transfer_8to16subro(in, Data->Cur + s, vGMC->y + s + 16*(x+y*Data->iEdgedWidth), Data->iEdgedWidth);                  transfer_8to16subro(in, Data->Cur + s, vGMC->y + s + 16*(x+y*Data->iEdgedWidth), Data->iEdgedWidth);
548                  bits += Block_CalcBits(coeff, in, Data->dctSpace + 128, Data->iQuant, Data->quant_type, &cbp, i);                  bits += Block_CalcBits(coeff, in, Data->dctSpace + 128, Data->iQuant, Data->quant_type, &cbp, i, Data->scan_table);
549                  if (bits >= Data->iMinSAD[0]) return bits;                  if (bits >= Data->iMinSAD[0]) return bits;
550          }          }
551    
# Line 486  Line 553 
553    
554          /*chroma U */          /*chroma U */
555          transfer_8to16subro(in, Data->CurU, vGMC->u + 8*(x+y*(Data->iEdgedWidth/2)), Data->iEdgedWidth/2);          transfer_8to16subro(in, Data->CurU, vGMC->u + 8*(x+y*(Data->iEdgedWidth/2)), Data->iEdgedWidth/2);
556          bits += Block_CalcBits(coeff, in, Data->dctSpace + 128, Data->iQuant, Data->quant_type, &cbp, 4);          bits += Block_CalcBits(coeff, in, Data->dctSpace + 128, Data->iQuant, Data->quant_type, &cbp, 4, Data->scan_table);
557    
558          if (bits >= Data->iMinSAD[0]) return bits;          if (bits >= Data->iMinSAD[0]) return bits;
559    
560          /* chroma V */          /* chroma V */
561          transfer_8to16subro(in, Data->CurV , vGMC->v + 8*(x+y*(Data->iEdgedWidth/2)), Data->iEdgedWidth/2);          transfer_8to16subro(in, Data->CurV , vGMC->v + 8*(x+y*(Data->iEdgedWidth/2)), Data->iEdgedWidth/2);
562          bits += Block_CalcBits(coeff, in, Data->dctSpace + 128, Data->iQuant, Data->quant_type, &cbp, 5);          bits += Block_CalcBits(coeff, in, Data->dctSpace + 128, Data->iQuant, Data->quant_type, &cbp, 5, Data->scan_table);
563    
564          bits += BITS_MULT*mcbpc_inter_tab[(MODE_INTER & 7) | ((cbp & 3) << 3)].len;          bits += BITS_MULT*mcbpc_inter_tab[(MODE_INTER & 7) | ((cbp & 3) << 3)].len;
565    
# Line 524  Line 591 
591          VECTOR backup[5], *v;          VECTOR backup[5], *v;
592          Data->iQuant = iQuant;          Data->iQuant = iQuant;
593          Data->cbp = c;          Data->cbp = c;
594            Data->scan_table = VopFlags & XVID_VOP_ALTERNATESCAN ?
595                                                    scan_tables[2] : scan_tables[0];
596    
597          pMB->mcsel = 0;          pMB->mcsel = 0;
598    
# Line 558  Line 627 
627                  }                  }
628          }          }
629    
630          intra_rd = findRD_intra(Data);          intra_rd = findRD_intra(Data, pMB, x, y, pParam->mb_width);
631          if (intra_rd < min_rd) {          if (intra_rd < min_rd) {
632                  *Data->iMinSAD = min_rd = intra_rd;                  *Data->iMinSAD = min_rd = intra_rd;
633                  mode = MODE_INTRA;                  mode = MODE_INTRA;
634                    cbp = *Data->cbp;
635          }          }
636    
637          pMB->sad16 = pMB->sad8[0] = pMB->sad8[1] = pMB->sad8[2] = pMB->sad8[3] = 0;          pMB->sad16 = pMB->sad8[0] = pMB->sad8[1] = pMB->sad8[2] = pMB->sad8[3] = 0;
# Line 630  Line 700 
700          int InterBias = MV16_INTER_BIAS;          int InterBias = MV16_INTER_BIAS;
701          int thresh = 0;          int thresh = 0;
702          int top = 0, top_right = 0, left = 0;          int top = 0, top_right = 0, left = 0;
703            Data->scan_table = VopFlags & XVID_VOP_ALTERNATESCAN ?
704                                                    scan_tables[2] : scan_tables[0];
705    
706          pMB->mcsel = 0;          pMB->mcsel = 0;
707    
# Line 814  Line 886 
886                          }                          }
887                  }                  }
888    
889                  intra_rd = findRD_intra(Data);                  intra_rd = findRD_intra(Data, pMB, x, y, pParam->mb_width);
890                  if (intra_rd < min_rd) {                  if (intra_rd < min_rd) {
891                          *Data->iMinSAD = min_rd = intra_rd;                          *Data->iMinSAD = min_rd = intra_rd;
892                          mode = MODE_INTRA;                          mode = MODE_INTRA;
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