mpeg4videoenc.c
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1 /*
2  * MPEG4 encoder.
3  * Copyright (c) 2000,2001 Fabrice Bellard
4  * Copyright (c) 2002-2010 Michael Niedermayer <michaelni@gmx.at>
5  *
6  * This file is part of Libav.
7  *
8  * Libav is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * Libav is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with Libav; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include "libavutil/log.h"
24 #include "libavutil/opt.h"
25 #include "mpegvideo.h"
26 #include "h263.h"
27 #include "mpeg4video.h"
28 
29 //The uni_DCtab_* tables below contain unified bits+length tables to encode DC
30 //differences in mpeg4. Unified in the sense that the specification specifies
31 //this encoding in several steps.
32 static uint8_t uni_DCtab_lum_len[512];
33 static uint8_t uni_DCtab_chrom_len[512];
34 static uint16_t uni_DCtab_lum_bits[512];
35 static uint16_t uni_DCtab_chrom_bits[512];
36 
37 //unified encoding tables for run length encoding of coefficients
38 //unified in the sense that the specification specifies the encoding in several steps.
39 static uint32_t uni_mpeg4_intra_rl_bits[64*64*2*2];
40 static uint8_t uni_mpeg4_intra_rl_len [64*64*2*2];
41 static uint32_t uni_mpeg4_inter_rl_bits[64*64*2*2];
42 static uint8_t uni_mpeg4_inter_rl_len [64*64*2*2];
43 //#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128 + (run)*256 + (level))
44 //#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run) + (level)*64)
45 #define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run)*128 + (level))
46 
47 /* mpeg4
48 inter
49 max level: 24/6
50 max run: 53/63
51 
52 intra
53 max level: 53/16
54 max run: 29/41
55 */
56 
57 
62 static inline int get_block_rate(MpegEncContext * s, DCTELEM block[64], int block_last_index, uint8_t scantable[64]){
63  int last=0;
64  int j;
65  int rate=0;
66 
67  for(j=1; j<=block_last_index; j++){
68  const int index= scantable[j];
69  int level= block[index];
70  if(level){
71  level+= 64;
72  if((level&(~127)) == 0){
73  if(j<block_last_index) rate+= s->intra_ac_vlc_length [UNI_AC_ENC_INDEX(j-last-1, level)];
74  else rate+= s->intra_ac_vlc_last_length[UNI_AC_ENC_INDEX(j-last-1, level)];
75  }else
76  rate += s->ac_esc_length;
77 
78  last= j;
79  }
80  }
81 
82  return rate;
83 }
84 
85 
94 static inline void restore_ac_coeffs(MpegEncContext * s, DCTELEM block[6][64], const int dir[6], uint8_t *st[6], const int zigzag_last_index[6])
95 {
96  int i, n;
97  memcpy(s->block_last_index, zigzag_last_index, sizeof(int)*6);
98 
99  for(n=0; n<6; n++){
100  int16_t *ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
101 
102  st[n]= s->intra_scantable.permutated;
103  if(dir[n]){
104  /* top prediction */
105  for(i=1; i<8; i++){
106  block[n][s->dsp.idct_permutation[i ]] = ac_val[i+8];
107  }
108  }else{
109  /* left prediction */
110  for(i=1; i<8; i++){
111  block[n][s->dsp.idct_permutation[i<<3]]= ac_val[i ];
112  }
113  }
114  }
115 }
116 
125 static inline int decide_ac_pred(MpegEncContext * s, DCTELEM block[6][64], const int dir[6], uint8_t *st[6], int zigzag_last_index[6])
126 {
127  int score= 0;
128  int i, n;
129  int8_t * const qscale_table = s->current_picture.f.qscale_table;
130 
131  memcpy(zigzag_last_index, s->block_last_index, sizeof(int)*6);
132 
133  for(n=0; n<6; n++){
134  int16_t *ac_val, *ac_val1;
135 
136  score -= get_block_rate(s, block[n], s->block_last_index[n], s->intra_scantable.permutated);
137 
138  ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
139  ac_val1= ac_val;
140  if(dir[n]){
141  const int xy= s->mb_x + s->mb_y*s->mb_stride - s->mb_stride;
142  /* top prediction */
143  ac_val-= s->block_wrap[n]*16;
144  if(s->mb_y==0 || s->qscale == qscale_table[xy] || n==2 || n==3){
145  /* same qscale */
146  for(i=1; i<8; i++){
147  const int level= block[n][s->dsp.idct_permutation[i ]];
148  block[n][s->dsp.idct_permutation[i ]] = level - ac_val[i+8];
149  ac_val1[i ]= block[n][s->dsp.idct_permutation[i<<3]];
150  ac_val1[i+8]= level;
151  }
152  }else{
153  /* different qscale, we must rescale */
154  for(i=1; i<8; i++){
155  const int level= block[n][s->dsp.idct_permutation[i ]];
156  block[n][s->dsp.idct_permutation[i ]] = level - ROUNDED_DIV(ac_val[i + 8]*qscale_table[xy], s->qscale);
157  ac_val1[i ]= block[n][s->dsp.idct_permutation[i<<3]];
158  ac_val1[i+8]= level;
159  }
160  }
161  st[n]= s->intra_h_scantable.permutated;
162  }else{
163  const int xy= s->mb_x-1 + s->mb_y*s->mb_stride;
164  /* left prediction */
165  ac_val-= 16;
166  if(s->mb_x==0 || s->qscale == qscale_table[xy] || n==1 || n==3){
167  /* same qscale */
168  for(i=1; i<8; i++){
169  const int level= block[n][s->dsp.idct_permutation[i<<3]];
170  block[n][s->dsp.idct_permutation[i<<3]]= level - ac_val[i];
171  ac_val1[i ]= level;
172  ac_val1[i+8]= block[n][s->dsp.idct_permutation[i ]];
173  }
174  }else{
175  /* different qscale, we must rescale */
176  for(i=1; i<8; i++){
177  const int level= block[n][s->dsp.idct_permutation[i<<3]];
178  block[n][s->dsp.idct_permutation[i<<3]]= level - ROUNDED_DIV(ac_val[i]*qscale_table[xy], s->qscale);
179  ac_val1[i ]= level;
180  ac_val1[i+8]= block[n][s->dsp.idct_permutation[i ]];
181  }
182  }
183  st[n]= s->intra_v_scantable.permutated;
184  }
185 
186  for(i=63; i>0; i--) //FIXME optimize
187  if(block[n][ st[n][i] ]) break;
188  s->block_last_index[n]= i;
189 
190  score += get_block_rate(s, block[n], s->block_last_index[n], st[n]);
191  }
192 
193  if(score < 0){
194  return 1;
195  }else{
196  restore_ac_coeffs(s, block, dir, st, zigzag_last_index);
197  return 0;
198  }
199 }
200 
205  int i;
206  int8_t * const qscale_table = s->current_picture.f.qscale_table;
207 
209 
210  if(s->pict_type== AV_PICTURE_TYPE_B){
211  int odd=0;
212  /* ok, come on, this isn't funny anymore, there's more code for handling this mpeg4 mess than for the actual adaptive quantization */
213 
214  for(i=0; i<s->mb_num; i++){
215  int mb_xy= s->mb_index2xy[i];
216  odd += qscale_table[mb_xy]&1;
217  }
218 
219  if(2*odd > s->mb_num) odd=1;
220  else odd=0;
221 
222  for(i=0; i<s->mb_num; i++){
223  int mb_xy= s->mb_index2xy[i];
224  if((qscale_table[mb_xy]&1) != odd)
225  qscale_table[mb_xy]++;
226  if(qscale_table[mb_xy] > 31)
227  qscale_table[mb_xy]= 31;
228  }
229 
230  for(i=1; i<s->mb_num; i++){
231  int mb_xy= s->mb_index2xy[i];
232  if(qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i-1]] && (s->mb_type[mb_xy]&CANDIDATE_MB_TYPE_DIRECT)){
233  s->mb_type[mb_xy]|= CANDIDATE_MB_TYPE_BIDIR;
234  }
235  }
236  }
237 }
238 
239 
244 static inline void mpeg4_encode_dc(PutBitContext * s, int level, int n)
245 {
246 #if 1
247  /* DC will overflow if level is outside the [-255,255] range. */
248  level+=256;
249  if (n < 4) {
250  /* luminance */
251  put_bits(s, uni_DCtab_lum_len[level], uni_DCtab_lum_bits[level]);
252  } else {
253  /* chrominance */
255  }
256 #else
257  int size, v;
258  /* find number of bits */
259  size = 0;
260  v = abs(level);
261  while (v) {
262  v >>= 1;
263  size++;
264  }
265 
266  if (n < 4) {
267  /* luminance */
268  put_bits(&s->pb, ff_mpeg4_DCtab_lum[size][1], ff_mpeg4_DCtab_lum[size][0]);
269  } else {
270  /* chrominance */
271  put_bits(&s->pb, ff_mpeg4_DCtab_chrom[size][1], ff_mpeg4_DCtab_chrom[size][0]);
272  }
273 
274  /* encode remaining bits */
275  if (size > 0) {
276  if (level < 0)
277  level = (-level) ^ ((1 << size) - 1);
278  put_bits(&s->pb, size, level);
279  if (size > 8)
280  put_bits(&s->pb, 1, 1);
281  }
282 #endif
283 }
284 
285 static inline int mpeg4_get_dc_length(int level, int n){
286  if (n < 4) {
287  return uni_DCtab_lum_len[level + 256];
288  } else {
289  return uni_DCtab_chrom_len[level + 256];
290  }
291 }
292 
297 static inline void mpeg4_encode_block(MpegEncContext * s, DCTELEM * block, int n, int intra_dc,
298  uint8_t *scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb)
299 {
300  int i, last_non_zero;
301  uint32_t *bits_tab;
302  uint8_t *len_tab;
303  const int last_index = s->block_last_index[n];
304 
305  if (s->mb_intra) { //Note gcc (3.2.1 at least) will optimize this away
306  /* mpeg4 based DC predictor */
307  mpeg4_encode_dc(dc_pb, intra_dc, n);
308  if(last_index<1) return;
309  i = 1;
310  bits_tab= uni_mpeg4_intra_rl_bits;
311  len_tab = uni_mpeg4_intra_rl_len;
312  } else {
313  if(last_index<0) return;
314  i = 0;
315  bits_tab= uni_mpeg4_inter_rl_bits;
316  len_tab = uni_mpeg4_inter_rl_len;
317  }
318 
319  /* AC coefs */
320  last_non_zero = i - 1;
321  for (; i < last_index; i++) {
322  int level = block[ scan_table[i] ];
323  if (level) {
324  int run = i - last_non_zero - 1;
325  level+=64;
326  if((level&(~127)) == 0){
327  const int index= UNI_MPEG4_ENC_INDEX(0, run, level);
328  put_bits(ac_pb, len_tab[index], bits_tab[index]);
329  }else{ //ESC3
330  put_bits(ac_pb, 7+2+1+6+1+12+1, (3<<23)+(3<<21)+(0<<20)+(run<<14)+(1<<13)+(((level-64)&0xfff)<<1)+1);
331  }
332  last_non_zero = i;
333  }
334  }
335  /*if(i<=last_index)*/{
336  int level = block[ scan_table[i] ];
337  int run = i - last_non_zero - 1;
338  level+=64;
339  if((level&(~127)) == 0){
340  const int index= UNI_MPEG4_ENC_INDEX(1, run, level);
341  put_bits(ac_pb, len_tab[index], bits_tab[index]);
342  }else{ //ESC3
343  put_bits(ac_pb, 7+2+1+6+1+12+1, (3<<23)+(3<<21)+(1<<20)+(run<<14)+(1<<13)+(((level-64)&0xfff)<<1)+1);
344  }
345  }
346 }
347 
348 static int mpeg4_get_block_length(MpegEncContext * s, DCTELEM * block, int n, int intra_dc,
349  uint8_t *scan_table)
350 {
351  int i, last_non_zero;
352  uint8_t *len_tab;
353  const int last_index = s->block_last_index[n];
354  int len=0;
355 
356  if (s->mb_intra) { //Note gcc (3.2.1 at least) will optimize this away
357  /* mpeg4 based DC predictor */
358  len += mpeg4_get_dc_length(intra_dc, n);
359  if(last_index<1) return len;
360  i = 1;
361  len_tab = uni_mpeg4_intra_rl_len;
362  } else {
363  if(last_index<0) return 0;
364  i = 0;
365  len_tab = uni_mpeg4_inter_rl_len;
366  }
367 
368  /* AC coefs */
369  last_non_zero = i - 1;
370  for (; i < last_index; i++) {
371  int level = block[ scan_table[i] ];
372  if (level) {
373  int run = i - last_non_zero - 1;
374  level+=64;
375  if((level&(~127)) == 0){
376  const int index= UNI_MPEG4_ENC_INDEX(0, run, level);
377  len += len_tab[index];
378  }else{ //ESC3
379  len += 7+2+1+6+1+12+1;
380  }
381  last_non_zero = i;
382  }
383  }
384  /*if(i<=last_index)*/{
385  int level = block[ scan_table[i] ];
386  int run = i - last_non_zero - 1;
387  level+=64;
388  if((level&(~127)) == 0){
389  const int index= UNI_MPEG4_ENC_INDEX(1, run, level);
390  len += len_tab[index];
391  }else{ //ESC3
392  len += 7+2+1+6+1+12+1;
393  }
394  }
395 
396  return len;
397 }
398 
399 static inline void mpeg4_encode_blocks(MpegEncContext * s, DCTELEM block[6][64], int intra_dc[6],
400  uint8_t **scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb){
401  int i;
402 
403  if(scan_table){
404  if(s->flags2 & CODEC_FLAG2_NO_OUTPUT){
405  for (i = 0; i < 6; i++) {
406  skip_put_bits(&s->pb, mpeg4_get_block_length(s, block[i], i, intra_dc[i], scan_table[i]));
407  }
408  }else{
409  /* encode each block */
410  for (i = 0; i < 6; i++) {
411  mpeg4_encode_block(s, block[i], i, intra_dc[i], scan_table[i], dc_pb, ac_pb);
412  }
413  }
414  }else{
415  if(s->flags2 & CODEC_FLAG2_NO_OUTPUT){
416  for (i = 0; i < 6; i++) {
418  }
419  }else{
420  /* encode each block */
421  for (i = 0; i < 6; i++) {
422  mpeg4_encode_block(s, block[i], i, 0, s->intra_scantable.permutated, dc_pb, ac_pb);
423  }
424  }
425  }
426 }
427 
428 static inline int get_b_cbp(MpegEncContext * s, DCTELEM block[6][64],
429  int motion_x, int motion_y, int mb_type)
430 {
431  int cbp = 0, i;
432 
433  if (s->flags & CODEC_FLAG_CBP_RD) {
434  int score = 0;
435  const int lambda = s->lambda2 >> (FF_LAMBDA_SHIFT - 6);
436 
437  for (i = 0; i < 6; i++)
438  if (s->coded_score[i] < 0) {
439  score += s->coded_score[i];
440  cbp |= 1 << (5 - i);
441  }
442 
443  if (cbp) {
444  int zero_score = -6;
445  if ((motion_x | motion_y | s->dquant | mb_type) == 0)
446  zero_score -= 4; //2*MV + mb_type + cbp bit
447 
448  zero_score *= lambda;
449  if (zero_score <= score)
450  cbp = 0;
451  }
452 
453  for (i = 0; i < 6; i++) {
454  if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i)) & 1) == 0) {
455  s->block_last_index[i] = -1;
456  s->dsp.clear_block(s->block[i]);
457  }
458  }
459  } else {
460  for (i = 0; i < 6; i++) {
461  if (s->block_last_index[i] >= 0)
462  cbp |= 1 << (5 - i);
463  }
464  }
465  return cbp;
466 }
467 
468 //FIXME this is duplicated to h263.c
469 static const int dquant_code[5]= {1,0,9,2,3};
470 
472  DCTELEM block[6][64],
473  int motion_x, int motion_y)
474 {
475  int cbpc, cbpy, pred_x, pred_y;
476  PutBitContext * const pb2 = s->data_partitioning ? &s->pb2 : &s->pb;
477  PutBitContext * const tex_pb = s->data_partitioning && s->pict_type!=AV_PICTURE_TYPE_B ? &s->tex_pb : &s->pb;
478  PutBitContext * const dc_pb = s->data_partitioning && s->pict_type!=AV_PICTURE_TYPE_I ? &s->pb2 : &s->pb;
479  const int interleaved_stats= (s->flags&CODEC_FLAG_PASS1) && !s->data_partitioning ? 1 : 0;
480 
481  if (!s->mb_intra) {
482  int i, cbp;
483 
485  static const int mb_type_table[8]= {-1, 3, 2, 1,-1,-1,-1, 0}; /* convert from mv_dir to type */
486  int mb_type= mb_type_table[s->mv_dir];
487 
488  if(s->mb_x==0){
489  for(i=0; i<2; i++){
490  s->last_mv[i][0][0]=
491  s->last_mv[i][0][1]=
492  s->last_mv[i][1][0]=
493  s->last_mv[i][1][1]= 0;
494  }
495  }
496 
497  assert(s->dquant>=-2 && s->dquant<=2);
498  assert((s->dquant&1)==0);
499  assert(mb_type>=0);
500 
501  /* nothing to do if this MB was skipped in the next P Frame */
502  if (s->next_picture.f.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]) { //FIXME avoid DCT & ...
503  s->skip_count++;
504  s->mv[0][0][0]=
505  s->mv[0][0][1]=
506  s->mv[1][0][0]=
507  s->mv[1][0][1]= 0;
508  s->mv_dir= MV_DIR_FORWARD; //doesn't matter
509  s->qscale -= s->dquant;
510 // s->mb_skipped=1;
511 
512  return;
513  }
514 
515  cbp= get_b_cbp(s, block, motion_x, motion_y, mb_type);
516 
517  if ((cbp | motion_x | motion_y | mb_type) ==0) {
518  /* direct MB with MV={0,0} */
519  assert(s->dquant==0);
520 
521  put_bits(&s->pb, 1, 1); /* mb not coded modb1=1 */
522 
523  if(interleaved_stats){
524  s->misc_bits++;
525  s->last_bits++;
526  }
527  s->skip_count++;
528  return;
529  }
530 
531  put_bits(&s->pb, 1, 0); /* mb coded modb1=0 */
532  put_bits(&s->pb, 1, cbp ? 0 : 1); /* modb2 */ //FIXME merge
533  put_bits(&s->pb, mb_type+1, 1); // this table is so simple that we don't need it :)
534  if(cbp) put_bits(&s->pb, 6, cbp);
535 
536  if(cbp && mb_type){
537  if(s->dquant)
538  put_bits(&s->pb, 2, (s->dquant>>2)+3);
539  else
540  put_bits(&s->pb, 1, 0);
541  }else
542  s->qscale -= s->dquant;
543 
544  if(!s->progressive_sequence){
545  if(cbp)
546  put_bits(&s->pb, 1, s->interlaced_dct);
547  if(mb_type) // not direct mode
548  put_bits(&s->pb, 1, s->mv_type == MV_TYPE_FIELD);
549  }
550 
551  if(interleaved_stats){
552  s->misc_bits+= get_bits_diff(s);
553  }
554 
555  if(mb_type == 0){
556  assert(s->mv_dir & MV_DIRECT);
557  ff_h263_encode_motion_vector(s, motion_x, motion_y, 1);
558  s->b_count++;
559  s->f_count++;
560  }else{
561  assert(mb_type > 0 && mb_type < 4);
562  if(s->mv_type != MV_TYPE_FIELD){
563  if(s->mv_dir & MV_DIR_FORWARD){
564  ff_h263_encode_motion_vector(s, s->mv[0][0][0] - s->last_mv[0][0][0],
565  s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
566  s->last_mv[0][0][0]= s->last_mv[0][1][0]= s->mv[0][0][0];
567  s->last_mv[0][0][1]= s->last_mv[0][1][1]= s->mv[0][0][1];
568  s->f_count++;
569  }
570  if(s->mv_dir & MV_DIR_BACKWARD){
571  ff_h263_encode_motion_vector(s, s->mv[1][0][0] - s->last_mv[1][0][0],
572  s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
573  s->last_mv[1][0][0]= s->last_mv[1][1][0]= s->mv[1][0][0];
574  s->last_mv[1][0][1]= s->last_mv[1][1][1]= s->mv[1][0][1];
575  s->b_count++;
576  }
577  }else{
578  if(s->mv_dir & MV_DIR_FORWARD){
579  put_bits(&s->pb, 1, s->field_select[0][0]);
580  put_bits(&s->pb, 1, s->field_select[0][1]);
581  }
582  if(s->mv_dir & MV_DIR_BACKWARD){
583  put_bits(&s->pb, 1, s->field_select[1][0]);
584  put_bits(&s->pb, 1, s->field_select[1][1]);
585  }
586  if(s->mv_dir & MV_DIR_FORWARD){
587  for(i=0; i<2; i++){
588  ff_h263_encode_motion_vector(s, s->mv[0][i][0] - s->last_mv[0][i][0] ,
589  s->mv[0][i][1] - s->last_mv[0][i][1]/2, s->f_code);
590  s->last_mv[0][i][0]= s->mv[0][i][0];
591  s->last_mv[0][i][1]= s->mv[0][i][1]*2;
592  }
593  s->f_count++;
594  }
595  if(s->mv_dir & MV_DIR_BACKWARD){
596  for(i=0; i<2; i++){
597  ff_h263_encode_motion_vector(s, s->mv[1][i][0] - s->last_mv[1][i][0] ,
598  s->mv[1][i][1] - s->last_mv[1][i][1]/2, s->b_code);
599  s->last_mv[1][i][0]= s->mv[1][i][0];
600  s->last_mv[1][i][1]= s->mv[1][i][1]*2;
601  }
602  s->b_count++;
603  }
604  }
605  }
606 
607  if(interleaved_stats){
608  s->mv_bits+= get_bits_diff(s);
609  }
610 
611  mpeg4_encode_blocks(s, block, NULL, NULL, NULL, &s->pb);
612 
613  if(interleaved_stats){
614  s->p_tex_bits+= get_bits_diff(s);
615  }
616 
617  }else{ /* s->pict_type==AV_PICTURE_TYPE_B */
618  cbp= get_p_cbp(s, block, motion_x, motion_y);
619 
620  if ((cbp | motion_x | motion_y | s->dquant) == 0 && s->mv_type==MV_TYPE_16X16) {
621  /* check if the B frames can skip it too, as we must skip it if we skip here
622  why didn't they just compress the skip-mb bits instead of reusing them ?! */
623  if(s->max_b_frames>0){
624  int i;
625  int x,y, offset;
626  uint8_t *p_pic;
627 
628  x= s->mb_x*16;
629  y= s->mb_y*16;
630  if(x+16 > s->width) x= s->width-16;
631  if(y+16 > s->height) y= s->height-16;
632 
633  offset= x + y*s->linesize;
634  p_pic = s->new_picture.f.data[0] + offset;
635 
636  s->mb_skipped=1;
637  for(i=0; i<s->max_b_frames; i++){
638  uint8_t *b_pic;
639  int diff;
640  Picture *pic= s->reordered_input_picture[i+1];
641 
642  if (pic == NULL || pic->f.pict_type != AV_PICTURE_TYPE_B)
643  break;
644 
645  b_pic = pic->f.data[0] + offset;
646  if (pic->f.type != FF_BUFFER_TYPE_SHARED)
647  b_pic+= INPLACE_OFFSET;
648  diff= s->dsp.sad[0](NULL, p_pic, b_pic, s->linesize, 16);
649  if(diff>s->qscale*70){ //FIXME check that 70 is optimal
650  s->mb_skipped=0;
651  break;
652  }
653  }
654  }else
655  s->mb_skipped=1;
656 
657  if(s->mb_skipped==1){
658  /* skip macroblock */
659  put_bits(&s->pb, 1, 1);
660 
661  if(interleaved_stats){
662  s->misc_bits++;
663  s->last_bits++;
664  }
665  s->skip_count++;
666 
667  return;
668  }
669  }
670 
671  put_bits(&s->pb, 1, 0); /* mb coded */
672  cbpc = cbp & 3;
673  cbpy = cbp >> 2;
674  cbpy ^= 0xf;
675  if(s->mv_type==MV_TYPE_16X16){
676  if(s->dquant) cbpc+= 8;
677  put_bits(&s->pb,
680 
681  put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
682  if(s->dquant)
683  put_bits(pb2, 2, dquant_code[s->dquant+2]);
684 
685  if(!s->progressive_sequence){
686  if(cbp)
687  put_bits(pb2, 1, s->interlaced_dct);
688  put_bits(pb2, 1, 0);
689  }
690 
691  if(interleaved_stats){
692  s->misc_bits+= get_bits_diff(s);
693  }
694 
695  /* motion vectors: 16x16 mode */
696  ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
697 
698  ff_h263_encode_motion_vector(s, motion_x - pred_x,
699  motion_y - pred_y, s->f_code);
700  }else if(s->mv_type==MV_TYPE_FIELD){
701  if(s->dquant) cbpc+= 8;
702  put_bits(&s->pb,
705 
706  put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
707  if(s->dquant)
708  put_bits(pb2, 2, dquant_code[s->dquant+2]);
709 
710  assert(!s->progressive_sequence);
711  if(cbp)
712  put_bits(pb2, 1, s->interlaced_dct);
713  put_bits(pb2, 1, 1);
714 
715  if(interleaved_stats){
716  s->misc_bits+= get_bits_diff(s);
717  }
718 
719  /* motion vectors: 16x8 interlaced mode */
720  ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
721  pred_y /=2;
722 
723  put_bits(&s->pb, 1, s->field_select[0][0]);
724  put_bits(&s->pb, 1, s->field_select[0][1]);
725 
726  ff_h263_encode_motion_vector(s, s->mv[0][0][0] - pred_x,
727  s->mv[0][0][1] - pred_y, s->f_code);
728  ff_h263_encode_motion_vector(s, s->mv[0][1][0] - pred_x,
729  s->mv[0][1][1] - pred_y, s->f_code);
730  }else{
731  assert(s->mv_type==MV_TYPE_8X8);
732  put_bits(&s->pb,
733  ff_h263_inter_MCBPC_bits[cbpc+16],
734  ff_h263_inter_MCBPC_code[cbpc+16]);
735  put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
736 
737  if(!s->progressive_sequence){
738  if(cbp)
739  put_bits(pb2, 1, s->interlaced_dct);
740  }
741 
742  if(interleaved_stats){
743  s->misc_bits+= get_bits_diff(s);
744  }
745 
746  for(i=0; i<4; i++){
747  /* motion vectors: 8x8 mode*/
748  ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y);
749 
751  s->current_picture.f.motion_val[0][ s->block_index[i] ][1] - pred_y, s->f_code);
752  }
753  }
754 
755  if(interleaved_stats){
756  s->mv_bits+= get_bits_diff(s);
757  }
758 
759  mpeg4_encode_blocks(s, block, NULL, NULL, NULL, tex_pb);
760 
761  if(interleaved_stats){
762  s->p_tex_bits+= get_bits_diff(s);
763  }
764  s->f_count++;
765  }
766  } else {
767  int cbp;
768  int dc_diff[6]; //dc values with the dc prediction subtracted
769  int dir[6]; //prediction direction
770  int zigzag_last_index[6];
771  uint8_t *scan_table[6];
772  int i;
773 
774  for(i=0; i<6; i++){
775  dc_diff[i]= ff_mpeg4_pred_dc(s, i, block[i][0], &dir[i], 1);
776  }
777 
778  if(s->flags & CODEC_FLAG_AC_PRED){
779  s->ac_pred= decide_ac_pred(s, block, dir, scan_table, zigzag_last_index);
780  }else{
781  for(i=0; i<6; i++)
782  scan_table[i]= s->intra_scantable.permutated;
783  }
784 
785  /* compute cbp */
786  cbp = 0;
787  for (i = 0; i < 6; i++) {
788  if (s->block_last_index[i] >= 1)
789  cbp |= 1 << (5 - i);
790  }
791 
792  cbpc = cbp & 3;
793  if (s->pict_type == AV_PICTURE_TYPE_I) {
794  if(s->dquant) cbpc+=4;
795  put_bits(&s->pb,
798  } else {
799  if(s->dquant) cbpc+=8;
800  put_bits(&s->pb, 1, 0); /* mb coded */
801  put_bits(&s->pb,
802  ff_h263_inter_MCBPC_bits[cbpc + 4],
803  ff_h263_inter_MCBPC_code[cbpc + 4]);
804  }
805  put_bits(pb2, 1, s->ac_pred);
806  cbpy = cbp >> 2;
807  put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
808  if(s->dquant)
809  put_bits(dc_pb, 2, dquant_code[s->dquant+2]);
810 
811  if(!s->progressive_sequence){
812  put_bits(dc_pb, 1, s->interlaced_dct);
813  }
814 
815  if(interleaved_stats){
816  s->misc_bits+= get_bits_diff(s);
817  }
818 
819  mpeg4_encode_blocks(s, block, dc_diff, scan_table, dc_pb, tex_pb);
820 
821  if(interleaved_stats){
822  s->i_tex_bits+= get_bits_diff(s);
823  }
824  s->i_count++;
825 
826  /* restore ac coeffs & last_index stuff if we messed them up with the prediction */
827  if(s->ac_pred)
828  restore_ac_coeffs(s, block, dir, scan_table, zigzag_last_index);
829  }
830 }
831 
836 {
837  int length;
838  put_bits(pbc, 1, 0);
839  length= (-put_bits_count(pbc))&7;
840  if(length) put_bits(pbc, length, (1<<length)-1);
841 }
842 
843 /* must be called before writing the header */
847  }else{
848  s->last_time_base= s->time_base;
849  s->time_base= s->time/s->avctx->time_base.den;
850  }
851 }
852 
854  int hours, minutes, seconds;
855  int64_t time;
856 
857  put_bits(&s->pb, 16, 0);
858  put_bits(&s->pb, 16, GOP_STARTCODE);
859 
860  time = s->current_picture_ptr->f.pts;
861  if(s->reordered_input_picture[1])
862  time = FFMIN(time, s->reordered_input_picture[1]->f.pts);
863  time= time*s->avctx->time_base.num;
864 
865  seconds= time/s->avctx->time_base.den;
866  minutes= seconds/60; seconds %= 60;
867  hours= minutes/60; minutes %= 60;
868  hours%=24;
869 
870  put_bits(&s->pb, 5, hours);
871  put_bits(&s->pb, 6, minutes);
872  put_bits(&s->pb, 1, 1);
873  put_bits(&s->pb, 6, seconds);
874 
875  put_bits(&s->pb, 1, !!(s->flags&CODEC_FLAG_CLOSED_GOP));
876  put_bits(&s->pb, 1, 0); //broken link == NO
877 
878  s->last_time_base= time / s->avctx->time_base.den;
879 
880  ff_mpeg4_stuffing(&s->pb);
881 }
882 
884  int profile_and_level_indication;
885  int vo_ver_id;
886 
887  if(s->avctx->profile != FF_PROFILE_UNKNOWN){
888  profile_and_level_indication = s->avctx->profile << 4;
889  }else if(s->max_b_frames || s->quarter_sample){
890  profile_and_level_indication= 0xF0; // adv simple
891  }else{
892  profile_and_level_indication= 0x00; // simple
893  }
894 
895  if(s->avctx->level != FF_LEVEL_UNKNOWN){
896  profile_and_level_indication |= s->avctx->level;
897  }else{
898  profile_and_level_indication |= 1; //level 1
899  }
900 
901  if(profile_and_level_indication>>4 == 0xF){
902  vo_ver_id= 5;
903  }else{
904  vo_ver_id= 1;
905  }
906 
907  //FIXME levels
908 
909  put_bits(&s->pb, 16, 0);
910  put_bits(&s->pb, 16, VOS_STARTCODE);
911 
912  put_bits(&s->pb, 8, profile_and_level_indication);
913 
914  put_bits(&s->pb, 16, 0);
915  put_bits(&s->pb, 16, VISUAL_OBJ_STARTCODE);
916 
917  put_bits(&s->pb, 1, 1);
918  put_bits(&s->pb, 4, vo_ver_id);
919  put_bits(&s->pb, 3, 1); //priority
920 
921  put_bits(&s->pb, 4, 1); //visual obj type== video obj
922 
923  put_bits(&s->pb, 1, 0); //video signal type == no clue //FIXME
924 
925  ff_mpeg4_stuffing(&s->pb);
926 }
927 
928 static void mpeg4_encode_vol_header(MpegEncContext * s, int vo_number, int vol_number)
929 {
930  int vo_ver_id;
931 
932  if (!CONFIG_MPEG4_ENCODER) return;
933 
934  if(s->max_b_frames || s->quarter_sample){
935  vo_ver_id= 5;
937  }else{
938  vo_ver_id= 1;
940  }
941 
942  put_bits(&s->pb, 16, 0);
943  put_bits(&s->pb, 16, 0x100 + vo_number); /* video obj */
944  put_bits(&s->pb, 16, 0);
945  put_bits(&s->pb, 16, 0x120 + vol_number); /* video obj layer */
946 
947  put_bits(&s->pb, 1, 0); /* random access vol */
948  put_bits(&s->pb, 8, s->vo_type); /* video obj type indication */
949  if(s->workaround_bugs & FF_BUG_MS) {
950  put_bits(&s->pb, 1, 0); /* is obj layer id= no */
951  } else {
952  put_bits(&s->pb, 1, 1); /* is obj layer id= yes */
953  put_bits(&s->pb, 4, vo_ver_id); /* is obj layer ver id */
954  put_bits(&s->pb, 3, 1); /* is obj layer priority */
955  }
956 
958 
959  put_bits(&s->pb, 4, s->aspect_ratio_info);/* aspect ratio info */
961  put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num);
962  put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den);
963  }
964 
965  if(s->workaround_bugs & FF_BUG_MS) { //
966  put_bits(&s->pb, 1, 0); /* vol control parameters= no @@@ */
967  } else {
968  put_bits(&s->pb, 1, 1); /* vol control parameters= yes */
969  put_bits(&s->pb, 2, 1); /* chroma format YUV 420/YV12 */
970  put_bits(&s->pb, 1, s->low_delay);
971  put_bits(&s->pb, 1, 0); /* vbv parameters= no */
972  }
973 
974  put_bits(&s->pb, 2, RECT_SHAPE); /* vol shape= rectangle */
975  put_bits(&s->pb, 1, 1); /* marker bit */
976 
977  put_bits(&s->pb, 16, s->avctx->time_base.den);
978  if (s->time_increment_bits < 1)
979  s->time_increment_bits = 1;
980  put_bits(&s->pb, 1, 1); /* marker bit */
981  put_bits(&s->pb, 1, 0); /* fixed vop rate=no */
982  put_bits(&s->pb, 1, 1); /* marker bit */
983  put_bits(&s->pb, 13, s->width); /* vol width */
984  put_bits(&s->pb, 1, 1); /* marker bit */
985  put_bits(&s->pb, 13, s->height); /* vol height */
986  put_bits(&s->pb, 1, 1); /* marker bit */
987  put_bits(&s->pb, 1, s->progressive_sequence ? 0 : 1);
988  put_bits(&s->pb, 1, 1); /* obmc disable */
989  if (vo_ver_id == 1) {
990  put_bits(&s->pb, 1, s->vol_sprite_usage); /* sprite enable */
991  }else{
992  put_bits(&s->pb, 2, s->vol_sprite_usage); /* sprite enable */
993  }
994 
995  put_bits(&s->pb, 1, 0); /* not 8 bit == false */
996  put_bits(&s->pb, 1, s->mpeg_quant); /* quant type= (0=h263 style)*/
997 
998  if(s->mpeg_quant){
1001  }
1002 
1003  if (vo_ver_id != 1)
1004  put_bits(&s->pb, 1, s->quarter_sample);
1005  put_bits(&s->pb, 1, 1); /* complexity estimation disable */
1006  s->resync_marker= s->rtp_mode;
1007  put_bits(&s->pb, 1, s->resync_marker ? 0 : 1);/* resync marker disable */
1008  put_bits(&s->pb, 1, s->data_partitioning ? 1 : 0);
1009  if(s->data_partitioning){
1010  put_bits(&s->pb, 1, 0); /* no rvlc */
1011  }
1012 
1013  if (vo_ver_id != 1){
1014  put_bits(&s->pb, 1, 0); /* newpred */
1015  put_bits(&s->pb, 1, 0); /* reduced res vop */
1016  }
1017  put_bits(&s->pb, 1, 0); /* scalability */
1018 
1019  ff_mpeg4_stuffing(&s->pb);
1020 
1021  /* user data */
1022  if(!(s->flags & CODEC_FLAG_BITEXACT)){
1023  put_bits(&s->pb, 16, 0);
1024  put_bits(&s->pb, 16, 0x1B2); /* user_data */
1026  }
1027 }
1028 
1029 /* write mpeg4 VOP header */
1030 void mpeg4_encode_picture_header(MpegEncContext * s, int picture_number)
1031 {
1032  int time_incr;
1033  int time_div, time_mod;
1034 
1035  if(s->pict_type==AV_PICTURE_TYPE_I){
1036  if(!(s->flags&CODEC_FLAG_GLOBAL_HEADER)){
1037  if(s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT) //HACK, the reference sw is buggy
1039  if(s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT || picture_number==0) //HACK, the reference sw is buggy
1040  mpeg4_encode_vol_header(s, 0, 0);
1041  }
1042  if(!(s->workaround_bugs & FF_BUG_MS))
1044  }
1045 
1047 
1048  put_bits(&s->pb, 16, 0); /* vop header */
1049  put_bits(&s->pb, 16, VOP_STARTCODE); /* vop header */
1050  put_bits(&s->pb, 2, s->pict_type - 1); /* pict type: I = 0 , P = 1 */
1051 
1052  assert(s->time>=0);
1053  time_div= s->time/s->avctx->time_base.den;
1054  time_mod= s->time%s->avctx->time_base.den;
1055  time_incr= time_div - s->last_time_base;
1056  assert(time_incr >= 0);
1057  while(time_incr--)
1058  put_bits(&s->pb, 1, 1);
1059 
1060  put_bits(&s->pb, 1, 0);
1061 
1062  put_bits(&s->pb, 1, 1); /* marker */
1063  put_bits(&s->pb, s->time_increment_bits, time_mod); /* time increment */
1064  put_bits(&s->pb, 1, 1); /* marker */
1065  put_bits(&s->pb, 1, 1); /* vop coded */
1066  if ( s->pict_type == AV_PICTURE_TYPE_P
1068  put_bits(&s->pb, 1, s->no_rounding); /* rounding type */
1069  }
1070  put_bits(&s->pb, 3, 0); /* intra dc VLC threshold */
1071  if(!s->progressive_sequence){
1073  put_bits(&s->pb, 1, s->alternate_scan);
1074  }
1075  //FIXME sprite stuff
1076 
1077  put_bits(&s->pb, 5, s->qscale);
1078 
1079  if (s->pict_type != AV_PICTURE_TYPE_I)
1080  put_bits(&s->pb, 3, s->f_code); /* fcode_for */
1081  if (s->pict_type == AV_PICTURE_TYPE_B)
1082  put_bits(&s->pb, 3, s->b_code); /* fcode_back */
1083 }
1084 
1085 
1086 static void init_uni_dc_tab(void)
1087 {
1088  int level, uni_code, uni_len;
1089 
1090  for(level=-256; level<256; level++){
1091  int size, v, l;
1092  /* find number of bits */
1093  size = 0;
1094  v = abs(level);
1095  while (v) {
1096  v >>= 1;
1097  size++;
1098  }
1099 
1100  if (level < 0)
1101  l= (-level) ^ ((1 << size) - 1);
1102  else
1103  l= level;
1104 
1105  /* luminance */
1106  uni_code= ff_mpeg4_DCtab_lum[size][0];
1107  uni_len = ff_mpeg4_DCtab_lum[size][1];
1108 
1109  if (size > 0) {
1110  uni_code<<=size; uni_code|=l;
1111  uni_len+=size;
1112  if (size > 8){
1113  uni_code<<=1; uni_code|=1;
1114  uni_len++;
1115  }
1116  }
1117  uni_DCtab_lum_bits[level+256]= uni_code;
1118  uni_DCtab_lum_len [level+256]= uni_len;
1119 
1120  /* chrominance */
1121  uni_code= ff_mpeg4_DCtab_chrom[size][0];
1122  uni_len = ff_mpeg4_DCtab_chrom[size][1];
1123 
1124  if (size > 0) {
1125  uni_code<<=size; uni_code|=l;
1126  uni_len+=size;
1127  if (size > 8){
1128  uni_code<<=1; uni_code|=1;
1129  uni_len++;
1130  }
1131  }
1132  uni_DCtab_chrom_bits[level+256]= uni_code;
1133  uni_DCtab_chrom_len [level+256]= uni_len;
1134 
1135  }
1136 }
1137 
1138 static void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab, uint8_t *len_tab){
1139  int slevel, run, last;
1140 
1141  assert(MAX_LEVEL >= 64);
1142  assert(MAX_RUN >= 63);
1143 
1144  for(slevel=-64; slevel<64; slevel++){
1145  if(slevel==0) continue;
1146  for(run=0; run<64; run++){
1147  for(last=0; last<=1; last++){
1148  const int index= UNI_MPEG4_ENC_INDEX(last, run, slevel+64);
1149  int level= slevel < 0 ? -slevel : slevel;
1150  int sign= slevel < 0 ? 1 : 0;
1151  int bits, len, code;
1152  int level1, run1;
1153 
1154  len_tab[index]= 100;
1155 
1156  /* ESC0 */
1157  code= get_rl_index(rl, last, run, level);
1158  bits= rl->table_vlc[code][0];
1159  len= rl->table_vlc[code][1];
1160  bits=bits*2+sign; len++;
1161 
1162  if(code!=rl->n && len < len_tab[index]){
1163  bits_tab[index]= bits;
1164  len_tab [index]= len;
1165  }
1166  /* ESC1 */
1167  bits= rl->table_vlc[rl->n][0];
1168  len= rl->table_vlc[rl->n][1];
1169  bits=bits*2; len++; //esc1
1170  level1= level - rl->max_level[last][run];
1171  if(level1>0){
1172  code= get_rl_index(rl, last, run, level1);
1173  bits<<= rl->table_vlc[code][1];
1174  len += rl->table_vlc[code][1];
1175  bits += rl->table_vlc[code][0];
1176  bits=bits*2+sign; len++;
1177 
1178  if(code!=rl->n && len < len_tab[index]){
1179  bits_tab[index]= bits;
1180  len_tab [index]= len;
1181  }
1182  }
1183  /* ESC2 */
1184  bits= rl->table_vlc[rl->n][0];
1185  len= rl->table_vlc[rl->n][1];
1186  bits=bits*4+2; len+=2; //esc2
1187  run1 = run - rl->max_run[last][level] - 1;
1188  if(run1>=0){
1189  code= get_rl_index(rl, last, run1, level);
1190  bits<<= rl->table_vlc[code][1];
1191  len += rl->table_vlc[code][1];
1192  bits += rl->table_vlc[code][0];
1193  bits=bits*2+sign; len++;
1194 
1195  if(code!=rl->n && len < len_tab[index]){
1196  bits_tab[index]= bits;
1197  len_tab [index]= len;
1198  }
1199  }
1200  /* ESC3 */
1201  bits= rl->table_vlc[rl->n][0];
1202  len = rl->table_vlc[rl->n][1];
1203  bits=bits*4+3; len+=2; //esc3
1204  bits=bits*2+last; len++;
1205  bits=bits*64+run; len+=6;
1206  bits=bits*2+1; len++; //marker
1207  bits=bits*4096+(slevel&0xfff); len+=12;
1208  bits=bits*2+1; len++; //marker
1209 
1210  if(len < len_tab[index]){
1211  bits_tab[index]= bits;
1212  len_tab [index]= len;
1213  }
1214  }
1215  }
1216  }
1217 }
1218 
1220 {
1221  MpegEncContext *s = avctx->priv_data;
1222  int ret;
1223  static int done = 0;
1224 
1225  if((ret=MPV_encode_init(avctx)) < 0)
1226  return ret;
1227 
1228  if (!done) {
1229  done = 1;
1230 
1231  init_uni_dc_tab();
1232 
1234 
1237  }
1238 
1239  s->min_qcoeff= -2048;
1240  s->max_qcoeff= 2047;
1246  s->ac_esc_length= 7+2+1+6+1+12+1;
1249 
1251 
1252  s->avctx->extradata= av_malloc(1024);
1253  init_put_bits(&s->pb, s->avctx->extradata, 1024);
1254 
1255  if(!(s->workaround_bugs & FF_BUG_MS))
1257  mpeg4_encode_vol_header(s, 0, 0);
1258 
1259 // ff_mpeg4_stuffing(&s->pb); ?
1260  flush_put_bits(&s->pb);
1261  s->avctx->extradata_size= (put_bits_count(&s->pb)+7)>>3;
1262  }
1263  return 0;
1264 }
1265 
1267 {
1268  uint8_t *start= put_bits_ptr(&s->pb);
1269  uint8_t *end= s->pb.buf_end;
1270  int size= end - start;
1271  int pb_size = (((intptr_t)start + size/3)&(~3)) - (intptr_t)start;
1272  int tex_size= (size - 2*pb_size)&(~3);
1273 
1274  set_put_bits_buffer_size(&s->pb, pb_size);
1275  init_put_bits(&s->tex_pb, start + pb_size , tex_size);
1276  init_put_bits(&s->pb2 , start + pb_size + tex_size, pb_size);
1277 }
1278 
1280 {
1281  const int pb2_len = put_bits_count(&s->pb2 );
1282  const int tex_pb_len= put_bits_count(&s->tex_pb);
1283  const int bits= put_bits_count(&s->pb);
1284 
1285  if(s->pict_type==AV_PICTURE_TYPE_I){
1286  put_bits(&s->pb, 19, DC_MARKER);
1287  s->misc_bits+=19 + pb2_len + bits - s->last_bits;
1288  s->i_tex_bits+= tex_pb_len;
1289  }else{
1290  put_bits(&s->pb, 17, MOTION_MARKER);
1291  s->misc_bits+=17 + pb2_len;
1292  s->mv_bits+= bits - s->last_bits;
1293  s->p_tex_bits+= tex_pb_len;
1294  }
1295 
1296  flush_put_bits(&s->pb2);
1297  flush_put_bits(&s->tex_pb);
1298 
1299  set_put_bits_buffer_size(&s->pb, s->pb2.buf_end - s->pb.buf);
1300  avpriv_copy_bits(&s->pb, s->pb2.buf , pb2_len);
1301  avpriv_copy_bits(&s->pb, s->tex_pb.buf, tex_pb_len);
1302  s->last_bits= put_bits_count(&s->pb);
1303 }
1304 
1305 
1307 {
1308  int mb_num_bits= av_log2(s->mb_num - 1) + 1;
1309 
1311  put_bits(&s->pb, 1, 1);
1312 
1313  put_bits(&s->pb, mb_num_bits, s->mb_x + s->mb_y*s->mb_width);
1314  put_bits(&s->pb, s->quant_precision, s->qscale);
1315  put_bits(&s->pb, 1, 0); /* no HEC */
1316 }
1317 
1318 #define OFFSET(x) offsetof(MpegEncContext, x)
1319 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
1320 static const AVOption options[] = {
1321  { "data_partitioning", "Use data partitioning.", OFFSET(data_partitioning), AV_OPT_TYPE_INT, { 0 }, 0, 1, VE },
1322  { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { 0 }, 0, 1, VE },
1323  { NULL },
1324 };
1325 
1326 static const AVClass mpeg4enc_class = {
1327  .class_name = "MPEG4 encoder",
1328  .item_name = av_default_item_name,
1329  .option = options,
1330  .version = LIBAVUTIL_VERSION_INT,
1331 };
1332 
1334  .name = "mpeg4",
1335  .type = AVMEDIA_TYPE_VIDEO,
1336  .id = CODEC_ID_MPEG4,
1337  .priv_data_size = sizeof(MpegEncContext),
1338  .init = encode_init,
1339  .encode = MPV_encode_picture,
1340  .close = MPV_encode_end,
1341  .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
1342  .capabilities= CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1343  .long_name= NULL_IF_CONFIG_SMALL("MPEG-4 part 2"),
1344  .priv_class = &mpeg4enc_class,
1345 };