Split the mpeg4 encoder and decoder off h263.c
[libav.git] / libavcodec / mpeg4videoenc.c
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ca334dd1
MN
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 FFmpeg.
7 *
8 * FFmpeg 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 * FFmpeg 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 FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23#include "mpegvideo.h"
24#include "h263.h"
25#include "mpeg4video.h"
26
27//The uni_DCtab_* tables below contain unified bits+length tables to encode DC
28//differences in mpeg4. Unified in the sense that the specification specifies
29//this encoding in several steps.
30static uint8_t uni_DCtab_lum_len[512];
31static uint8_t uni_DCtab_chrom_len[512];
32static uint16_t uni_DCtab_lum_bits[512];
33static uint16_t uni_DCtab_chrom_bits[512];
34
35//unified encoding tables for run length encoding of coefficients
36//unified in the sense that the specification specifies the encoding in several steps.
37static uint32_t uni_mpeg4_intra_rl_bits[64*64*2*2];
38static uint8_t uni_mpeg4_intra_rl_len [64*64*2*2];
39static uint32_t uni_mpeg4_inter_rl_bits[64*64*2*2];
40static uint8_t uni_mpeg4_inter_rl_len [64*64*2*2];
41//#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128 + (run)*256 + (level))
42//#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run) + (level)*64)
43#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run)*128 + (level))
44
45/* mpeg4
46inter
47max level: 24/6
48max run: 53/63
49
50intra
51max level: 53/16
52max run: 29/41
53*/
54
55
56/**
57 * Returns the number of bits that encoding the 8x8 block in block would need.
58 * @param[in] block_last_index last index in scantable order that refers to a non zero element in block.
59 */
60static inline int get_block_rate(MpegEncContext * s, DCTELEM block[64], int block_last_index, uint8_t scantable[64]){
61 int last=0;
62 int j;
63 int rate=0;
64
65 for(j=1; j<=block_last_index; j++){
66 const int index= scantable[j];
67 int level= block[index];
68 if(level){
69 level+= 64;
70 if((level&(~127)) == 0){
71 if(j<block_last_index) rate+= s->intra_ac_vlc_length [UNI_AC_ENC_INDEX(j-last-1, level)];
72 else rate+= s->intra_ac_vlc_last_length[UNI_AC_ENC_INDEX(j-last-1, level)];
73 }else
74 rate += s->ac_esc_length;
75
76 last= j;
77 }
78 }
79
80 return rate;
81}
82
83
84/**
85 * Restores the ac coefficients in block that have been changed by decide_ac_pred().
86 * This function also restores s->block_last_index.
87 * @param[in,out] block MB coefficients, these will be restored
88 * @param[in] dir ac prediction direction for each 8x8 block
89 * @param[out] st scantable for each 8x8 block
90 * @param[in] zigzag_last_index index refering to the last non zero coefficient in zigzag order
91 */
92static 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])
93{
94 int i, n;
95 memcpy(s->block_last_index, zigzag_last_index, sizeof(int)*6);
96
97 for(n=0; n<6; n++){
98 int16_t *ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
99
100 st[n]= s->intra_scantable.permutated;
101 if(dir[n]){
102 /* top prediction */
103 for(i=1; i<8; i++){
104 block[n][s->dsp.idct_permutation[i ]] = ac_val[i+8];
105 }
106 }else{
107 /* left prediction */
108 for(i=1; i<8; i++){
109 block[n][s->dsp.idct_permutation[i<<3]]= ac_val[i ];
110 }
111 }
112 }
113}
114
115/**
116 * Returns the optimal value (0 or 1) for the ac_pred element for the given MB in mpeg4.
117 * This function will also update s->block_last_index and s->ac_val.
118 * @param[in,out] block MB coefficients, these will be updated if 1 is returned
119 * @param[in] dir ac prediction direction for each 8x8 block
120 * @param[out] st scantable for each 8x8 block
121 * @param[out] zigzag_last_index index refering to the last non zero coefficient in zigzag order
122 */
123static inline int decide_ac_pred(MpegEncContext * s, DCTELEM block[6][64], const int dir[6], uint8_t *st[6], int zigzag_last_index[6])
124{
125 int score= 0;
126 int i, n;
127 int8_t * const qscale_table= s->current_picture.qscale_table;
128
129 memcpy(zigzag_last_index, s->block_last_index, sizeof(int)*6);
130
131 for(n=0; n<6; n++){
132 int16_t *ac_val, *ac_val1;
133
134 score -= get_block_rate(s, block[n], s->block_last_index[n], s->intra_scantable.permutated);
135
136 ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
137 ac_val1= ac_val;
138 if(dir[n]){
139 const int xy= s->mb_x + s->mb_y*s->mb_stride - s->mb_stride;
140 /* top prediction */
141 ac_val-= s->block_wrap[n]*16;
142 if(s->mb_y==0 || s->qscale == qscale_table[xy] || n==2 || n==3){
143 /* same qscale */
144 for(i=1; i<8; i++){
145 const int level= block[n][s->dsp.idct_permutation[i ]];
146 block[n][s->dsp.idct_permutation[i ]] = level - ac_val[i+8];
147 ac_val1[i ]= block[n][s->dsp.idct_permutation[i<<3]];
148 ac_val1[i+8]= level;
149 }
150 }else{
151 /* different qscale, we must rescale */
152 for(i=1; i<8; i++){
153 const int level= block[n][s->dsp.idct_permutation[i ]];
154 block[n][s->dsp.idct_permutation[i ]] = level - ROUNDED_DIV(ac_val[i + 8]*qscale_table[xy], s->qscale);
155 ac_val1[i ]= block[n][s->dsp.idct_permutation[i<<3]];
156 ac_val1[i+8]= level;
157 }
158 }
159 st[n]= s->intra_h_scantable.permutated;
160 }else{
161 const int xy= s->mb_x-1 + s->mb_y*s->mb_stride;
162 /* left prediction */
163 ac_val-= 16;
164 if(s->mb_x==0 || s->qscale == qscale_table[xy] || n==1 || n==3){
165 /* same qscale */
166 for(i=1; i<8; i++){
167 const int level= block[n][s->dsp.idct_permutation[i<<3]];
168 block[n][s->dsp.idct_permutation[i<<3]]= level - ac_val[i];
169 ac_val1[i ]= level;
170 ac_val1[i+8]= block[n][s->dsp.idct_permutation[i ]];
171 }
172 }else{
173 /* different qscale, we must rescale */
174 for(i=1; i<8; i++){
175 const int level= block[n][s->dsp.idct_permutation[i<<3]];
176 block[n][s->dsp.idct_permutation[i<<3]]= level - ROUNDED_DIV(ac_val[i]*qscale_table[xy], s->qscale);
177 ac_val1[i ]= level;
178 ac_val1[i+8]= block[n][s->dsp.idct_permutation[i ]];
179 }
180 }
181 st[n]= s->intra_v_scantable.permutated;
182 }
183
184 for(i=63; i>0; i--) //FIXME optimize
185 if(block[n][ st[n][i] ]) break;
186 s->block_last_index[n]= i;
187
188 score += get_block_rate(s, block[n], s->block_last_index[n], st[n]);
189 }
190
191 if(score < 0){
192 return 1;
193 }else{
194 restore_ac_coeffs(s, block, dir, st, zigzag_last_index);
195 return 0;
196 }
197}
198
199/**
200 * modify mb_type & qscale so that encoding is acually possible in mpeg4
201 */
202void ff_clean_mpeg4_qscales(MpegEncContext *s){
203 int i;
204 int8_t * const qscale_table= s->current_picture.qscale_table;
205
206 ff_clean_h263_qscales(s);
207
208 if(s->pict_type== FF_B_TYPE){
209 int odd=0;
210 /* ok, come on, this isn't funny anymore, there's more code for handling this mpeg4 mess than for the actual adaptive quantization */
211
212 for(i=0; i<s->mb_num; i++){
213 int mb_xy= s->mb_index2xy[i];
214 odd += qscale_table[mb_xy]&1;
215 }
216
217 if(2*odd > s->mb_num) odd=1;
218 else odd=0;
219
220 for(i=0; i<s->mb_num; i++){
221 int mb_xy= s->mb_index2xy[i];
222 if((qscale_table[mb_xy]&1) != odd)
223 qscale_table[mb_xy]++;
224 if(qscale_table[mb_xy] > 31)
225 qscale_table[mb_xy]= 31;
226 }
227
228 for(i=1; i<s->mb_num; i++){
229 int mb_xy= s->mb_index2xy[i];
230 if(qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i-1]] && (s->mb_type[mb_xy]&CANDIDATE_MB_TYPE_DIRECT)){
231 s->mb_type[mb_xy]|= CANDIDATE_MB_TYPE_BIDIR;
232 }
233 }
234 }
235}
236
237
238/**
239 * encodes the dc value.
240 * @param n block index (0-3 are luma, 4-5 are chroma)
241 */
242static inline void mpeg4_encode_dc(PutBitContext * s, int level, int n)
243{
244#if 1
245 level+=256;
246 if (n < 4) {
247 /* luminance */
248 put_bits(s, uni_DCtab_lum_len[level], uni_DCtab_lum_bits[level]);
249 } else {
250 /* chrominance */
251 put_bits(s, uni_DCtab_chrom_len[level], uni_DCtab_chrom_bits[level]);
252 }
253#else
254 int size, v;
255 /* find number of bits */
256 size = 0;
257 v = abs(level);
258 while (v) {
259 v >>= 1;
260 size++;
261 }
262
263 if (n < 4) {
264 /* luminance */
265 put_bits(&s->pb, DCtab_lum[size][1], DCtab_lum[size][0]);
266 } else {
267 /* chrominance */
268 put_bits(&s->pb, DCtab_chrom[size][1], DCtab_chrom[size][0]);
269 }
270
271 /* encode remaining bits */
272 if (size > 0) {
273 if (level < 0)
274 level = (-level) ^ ((1 << size) - 1);
275 put_bits(&s->pb, size, level);
276 if (size > 8)
277 put_bits(&s->pb, 1, 1);
278 }
279#endif
280}
281
282static inline int mpeg4_get_dc_length(int level, int n){
283 if (n < 4) {
284 return uni_DCtab_lum_len[level + 256];
285 } else {
286 return uni_DCtab_chrom_len[level + 256];
287 }
288}
289
290/**
291 * encodes a 8x8 block
292 * @param n block index (0-3 are luma, 4-5 are chroma)
293 */
294static inline void mpeg4_encode_block(MpegEncContext * s, DCTELEM * block, int n, int intra_dc,
295 uint8_t *scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb)
296{
297 int i, last_non_zero;
298#if 0 //variables for the outcommented version
299 int code, sign, last;
300#endif
301 const RLTable *rl;
302 uint32_t *bits_tab;
303 uint8_t *len_tab;
304 const int last_index = s->block_last_index[n];
305
306 if (s->mb_intra) { //Note gcc (3.2.1 at least) will optimize this away
307 /* mpeg4 based DC predictor */
308 mpeg4_encode_dc(dc_pb, intra_dc, n);
309 if(last_index<1) return;
310 i = 1;
311 rl = &rl_intra;
312 bits_tab= uni_mpeg4_intra_rl_bits;
313 len_tab = uni_mpeg4_intra_rl_len;
314 } else {
315 if(last_index<0) return;
316 i = 0;
317 rl = &rl_inter;
318 bits_tab= uni_mpeg4_inter_rl_bits;
319 len_tab = uni_mpeg4_inter_rl_len;
320 }
321
322 /* AC coefs */
323 last_non_zero = i - 1;
324#if 1
325 for (; i < last_index; i++) {
326 int level = block[ scan_table[i] ];
327 if (level) {
328 int run = i - last_non_zero - 1;
329 level+=64;
330 if((level&(~127)) == 0){
331 const int index= UNI_MPEG4_ENC_INDEX(0, run, level);
332 put_bits(ac_pb, len_tab[index], bits_tab[index]);
333 }else{ //ESC3
334 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);
335 }
336 last_non_zero = i;
337 }
338 }
339 /*if(i<=last_index)*/{
340 int level = block[ scan_table[i] ];
341 int run = i - last_non_zero - 1;
342 level+=64;
343 if((level&(~127)) == 0){
344 const int index= UNI_MPEG4_ENC_INDEX(1, run, level);
345 put_bits(ac_pb, len_tab[index], bits_tab[index]);
346 }else{ //ESC3
347 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);
348 }
349 }
350#else
351 for (; i <= last_index; i++) {
352 const int slevel = block[ scan_table[i] ];
353 if (slevel) {
354 int level;
355 int run = i - last_non_zero - 1;
356 last = (i == last_index);
357 sign = 0;
358 level = slevel;
359 if (level < 0) {
360 sign = 1;
361 level = -level;
362 }
363 code = get_rl_index(rl, last, run, level);
364 put_bits(ac_pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
365 if (code == rl->n) {
366 int level1, run1;
367 level1 = level - rl->max_level[last][run];
368 if (level1 < 1)
369 goto esc2;
370 code = get_rl_index(rl, last, run, level1);
371 if (code == rl->n) {
372 esc2:
373 put_bits(ac_pb, 1, 1);
374 if (level > MAX_LEVEL)
375 goto esc3;
376 run1 = run - rl->max_run[last][level] - 1;
377 if (run1 < 0)
378 goto esc3;
379 code = get_rl_index(rl, last, run1, level);
380 if (code == rl->n) {
381 esc3:
382 /* third escape */
383 put_bits(ac_pb, 1, 1);
384 put_bits(ac_pb, 1, last);
385 put_bits(ac_pb, 6, run);
386 put_bits(ac_pb, 1, 1);
387 put_sbits(ac_pb, 12, slevel);
388 put_bits(ac_pb, 1, 1);
389 } else {
390 /* second escape */
391 put_bits(ac_pb, 1, 0);
392 put_bits(ac_pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
393 put_bits(ac_pb, 1, sign);
394 }
395 } else {
396 /* first escape */
397 put_bits(ac_pb, 1, 0);
398 put_bits(ac_pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
399 put_bits(ac_pb, 1, sign);
400 }
401 } else {
402 put_bits(ac_pb, 1, sign);
403 }
404 last_non_zero = i;
405 }
406 }
407#endif
408}
409
410static int mpeg4_get_block_length(MpegEncContext * s, DCTELEM * block, int n, int intra_dc,
411 uint8_t *scan_table)
412{
413 int i, last_non_zero;
414 uint8_t *len_tab;
415 const int last_index = s->block_last_index[n];
416 int len=0;
417
418 if (s->mb_intra) { //Note gcc (3.2.1 at least) will optimize this away
419 /* mpeg4 based DC predictor */
420 len += mpeg4_get_dc_length(intra_dc, n);
421 if(last_index<1) return len;
422 i = 1;
423 len_tab = uni_mpeg4_intra_rl_len;
424 } else {
425 if(last_index<0) return 0;
426 i = 0;
427 len_tab = uni_mpeg4_inter_rl_len;
428 }
429
430 /* AC coefs */
431 last_non_zero = i - 1;
432 for (; i < last_index; i++) {
433 int level = block[ scan_table[i] ];
434 if (level) {
435 int run = i - last_non_zero - 1;
436 level+=64;
437 if((level&(~127)) == 0){
438 const int index= UNI_MPEG4_ENC_INDEX(0, run, level);
439 len += len_tab[index];
440 }else{ //ESC3
441 len += 7+2+1+6+1+12+1;
442 }
443 last_non_zero = i;
444 }
445 }
446 /*if(i<=last_index)*/{
447 int level = block[ scan_table[i] ];
448 int run = i - last_non_zero - 1;
449 level+=64;
450 if((level&(~127)) == 0){
451 const int index= UNI_MPEG4_ENC_INDEX(1, run, level);
452 len += len_tab[index];
453 }else{ //ESC3
454 len += 7+2+1+6+1+12+1;
455 }
456 }
457
458 return len;
459}
460
461static inline void mpeg4_encode_blocks(MpegEncContext * s, DCTELEM block[6][64], int intra_dc[6],
462 uint8_t **scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb){
463 int i;
464
465 if(scan_table){
466 if(s->flags2 & CODEC_FLAG2_NO_OUTPUT){
467 for (i = 0; i < 6; i++) {
468 skip_put_bits(&s->pb, mpeg4_get_block_length(s, block[i], i, intra_dc[i], scan_table[i]));
469 }
470 }else{
471 /* encode each block */
472 for (i = 0; i < 6; i++) {
473 mpeg4_encode_block(s, block[i], i, intra_dc[i], scan_table[i], dc_pb, ac_pb);
474 }
475 }
476 }else{
477 if(s->flags2 & CODEC_FLAG2_NO_OUTPUT){
478 for (i = 0; i < 6; i++) {
479 skip_put_bits(&s->pb, mpeg4_get_block_length(s, block[i], i, 0, s->intra_scantable.permutated));
480 }
481 }else{
482 /* encode each block */
483 for (i = 0; i < 6; i++) {
484 mpeg4_encode_block(s, block[i], i, 0, s->intra_scantable.permutated, dc_pb, ac_pb);
485 }
486 }
487 }
488}
489
490//FIXME this is duplicated to h263.c
491static const int dquant_code[5]= {1,0,9,2,3};
492
493void mpeg4_encode_mb(MpegEncContext * s,
494 DCTELEM block[6][64],
495 int motion_x, int motion_y)
496{
497 int cbpc, cbpy, pred_x, pred_y;
498 PutBitContext * const pb2 = s->data_partitioning ? &s->pb2 : &s->pb;
499 PutBitContext * const tex_pb = s->data_partitioning && s->pict_type!=FF_B_TYPE ? &s->tex_pb : &s->pb;
500 PutBitContext * const dc_pb = s->data_partitioning && s->pict_type!=FF_I_TYPE ? &s->pb2 : &s->pb;
501 const int interleaved_stats= (s->flags&CODEC_FLAG_PASS1) && !s->data_partitioning ? 1 : 0;
502
503 if (!s->mb_intra) {
504 int i, cbp;
505
506 if(s->pict_type==FF_B_TYPE){
507 static const int mb_type_table[8]= {-1, 3, 2, 1,-1,-1,-1, 0}; /* convert from mv_dir to type */
508 int mb_type= mb_type_table[s->mv_dir];
509
510 if(s->mb_x==0){
511 for(i=0; i<2; i++){
512 s->last_mv[i][0][0]=
513 s->last_mv[i][0][1]=
514 s->last_mv[i][1][0]=
515 s->last_mv[i][1][1]= 0;
516 }
517 }
518
519 assert(s->dquant>=-2 && s->dquant<=2);
520 assert((s->dquant&1)==0);
521 assert(mb_type>=0);
522
523 /* nothing to do if this MB was skipped in the next P Frame */
524 if(s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]){ //FIXME avoid DCT & ...
525 s->skip_count++;
526 s->mv[0][0][0]=
527 s->mv[0][0][1]=
528 s->mv[1][0][0]=
529 s->mv[1][0][1]= 0;
530 s->mv_dir= MV_DIR_FORWARD; //doesn't matter
531 s->qscale -= s->dquant;
532// s->mb_skipped=1;
533
534 return;
535 }
536
537 cbp= get_b_cbp(s, block, motion_x, motion_y, mb_type);
538
539 if ((cbp | motion_x | motion_y | mb_type) ==0) {
540 /* direct MB with MV={0,0} */
541 assert(s->dquant==0);
542
543 put_bits(&s->pb, 1, 1); /* mb not coded modb1=1 */
544
545 if(interleaved_stats){
546 s->misc_bits++;
547 s->last_bits++;
548 }
549 s->skip_count++;
550 return;
551 }
552
553 put_bits(&s->pb, 1, 0); /* mb coded modb1=0 */
554 put_bits(&s->pb, 1, cbp ? 0 : 1); /* modb2 */ //FIXME merge
555 put_bits(&s->pb, mb_type+1, 1); // this table is so simple that we don't need it :)
556 if(cbp) put_bits(&s->pb, 6, cbp);
557
558 if(cbp && mb_type){
559 if(s->dquant)
560 put_bits(&s->pb, 2, (s->dquant>>2)+3);
561 else
562 put_bits(&s->pb, 1, 0);
563 }else
564 s->qscale -= s->dquant;
565
566 if(!s->progressive_sequence){
567 if(cbp)
568 put_bits(&s->pb, 1, s->interlaced_dct);
569 if(mb_type) // not direct mode
570 put_bits(&s->pb, 1, s->mv_type == MV_TYPE_FIELD);
571 }
572
573 if(interleaved_stats){
574 s->misc_bits+= get_bits_diff(s);
575 }
576
577 if(mb_type == 0){
578 assert(s->mv_dir & MV_DIRECT);
579 ff_h263_encode_motion_vector(s, motion_x, motion_y, 1);
580 s->b_count++;
581 s->f_count++;
582 }else{
583 assert(mb_type > 0 && mb_type < 4);
584 if(s->mv_type != MV_TYPE_FIELD){
585 if(s->mv_dir & MV_DIR_FORWARD){
586 ff_h263_encode_motion_vector(s, s->mv[0][0][0] - s->last_mv[0][0][0],
587 s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
588 s->last_mv[0][0][0]= s->last_mv[0][1][0]= s->mv[0][0][0];
589 s->last_mv[0][0][1]= s->last_mv[0][1][1]= s->mv[0][0][1];
590 s->f_count++;
591 }
592 if(s->mv_dir & MV_DIR_BACKWARD){
593 ff_h263_encode_motion_vector(s, s->mv[1][0][0] - s->last_mv[1][0][0],
594 s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
595 s->last_mv[1][0][0]= s->last_mv[1][1][0]= s->mv[1][0][0];
596 s->last_mv[1][0][1]= s->last_mv[1][1][1]= s->mv[1][0][1];
597 s->b_count++;
598 }
599 }else{
600 if(s->mv_dir & MV_DIR_FORWARD){
601 put_bits(&s->pb, 1, s->field_select[0][0]);
602 put_bits(&s->pb, 1, s->field_select[0][1]);
603 }
604 if(s->mv_dir & MV_DIR_BACKWARD){
605 put_bits(&s->pb, 1, s->field_select[1][0]);
606 put_bits(&s->pb, 1, s->field_select[1][1]);
607 }
608 if(s->mv_dir & MV_DIR_FORWARD){
609 for(i=0; i<2; i++){
610 ff_h263_encode_motion_vector(s, s->mv[0][i][0] - s->last_mv[0][i][0] ,
611 s->mv[0][i][1] - s->last_mv[0][i][1]/2, s->f_code);
612 s->last_mv[0][i][0]= s->mv[0][i][0];
613 s->last_mv[0][i][1]= s->mv[0][i][1]*2;
614 }
615 s->f_count++;
616 }
617 if(s->mv_dir & MV_DIR_BACKWARD){
618 for(i=0; i<2; i++){
619 ff_h263_encode_motion_vector(s, s->mv[1][i][0] - s->last_mv[1][i][0] ,
620 s->mv[1][i][1] - s->last_mv[1][i][1]/2, s->b_code);
621 s->last_mv[1][i][0]= s->mv[1][i][0];
622 s->last_mv[1][i][1]= s->mv[1][i][1]*2;
623 }
624 s->b_count++;
625 }
626 }
627 }
628
629 if(interleaved_stats){
630 s->mv_bits+= get_bits_diff(s);
631 }
632
633 mpeg4_encode_blocks(s, block, NULL, NULL, NULL, &s->pb);
634
635 if(interleaved_stats){
636 s->p_tex_bits+= get_bits_diff(s);
637 }
638
639 }else{ /* s->pict_type==FF_B_TYPE */
640 cbp= get_p_cbp(s, block, motion_x, motion_y);
641
642 if ((cbp | motion_x | motion_y | s->dquant) == 0 && s->mv_type==MV_TYPE_16X16) {
643 /* check if the B frames can skip it too, as we must skip it if we skip here
644 why didn't they just compress the skip-mb bits instead of reusing them ?! */
645 if(s->max_b_frames>0){
646 int i;
647 int x,y, offset;
648 uint8_t *p_pic;
649
650 x= s->mb_x*16;
651 y= s->mb_y*16;
652 if(x+16 > s->width) x= s->width-16;
653 if(y+16 > s->height) y= s->height-16;
654
655 offset= x + y*s->linesize;
656 p_pic= s->new_picture.data[0] + offset;
657
658 s->mb_skipped=1;
659 for(i=0; i<s->max_b_frames; i++){
660 uint8_t *b_pic;
661 int diff;
662 Picture *pic= s->reordered_input_picture[i+1];
663
664 if(pic==NULL || pic->pict_type!=FF_B_TYPE) break;
665
666 b_pic= pic->data[0] + offset;
667 if(pic->type != FF_BUFFER_TYPE_SHARED)
668 b_pic+= INPLACE_OFFSET;
669 diff= s->dsp.sad[0](NULL, p_pic, b_pic, s->linesize, 16);
670 if(diff>s->qscale*70){ //FIXME check that 70 is optimal
671 s->mb_skipped=0;
672 break;
673 }
674 }
675 }else
676 s->mb_skipped=1;
677
678 if(s->mb_skipped==1){
679 /* skip macroblock */
680 put_bits(&s->pb, 1, 1);
681
682 if(interleaved_stats){
683 s->misc_bits++;
684 s->last_bits++;
685 }
686 s->skip_count++;
687
688 return;
689 }
690 }
691
692 put_bits(&s->pb, 1, 0); /* mb coded */
693 cbpc = cbp & 3;
694 cbpy = cbp >> 2;
695 cbpy ^= 0xf;
696 if(s->mv_type==MV_TYPE_16X16){
697 if(s->dquant) cbpc+= 8;
698 put_bits(&s->pb,
699 inter_MCBPC_bits[cbpc],
700 inter_MCBPC_code[cbpc]);
701
702 put_bits(pb2, cbpy_tab[cbpy][1], cbpy_tab[cbpy][0]);
703 if(s->dquant)
704 put_bits(pb2, 2, dquant_code[s->dquant+2]);
705
706 if(!s->progressive_sequence){
707 if(cbp)
708 put_bits(pb2, 1, s->interlaced_dct);
709 put_bits(pb2, 1, 0);
710 }
711
712 if(interleaved_stats){
713 s->misc_bits+= get_bits_diff(s);
714 }
715
716 /* motion vectors: 16x16 mode */
717 h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
718
719 ff_h263_encode_motion_vector(s, motion_x - pred_x,
720 motion_y - pred_y, s->f_code);
721 }else if(s->mv_type==MV_TYPE_FIELD){
722 if(s->dquant) cbpc+= 8;
723 put_bits(&s->pb,
724 inter_MCBPC_bits[cbpc],
725 inter_MCBPC_code[cbpc]);
726
727 put_bits(pb2, cbpy_tab[cbpy][1], cbpy_tab[cbpy][0]);
728 if(s->dquant)
729 put_bits(pb2, 2, dquant_code[s->dquant+2]);
730
731 assert(!s->progressive_sequence);
732 if(cbp)
733 put_bits(pb2, 1, s->interlaced_dct);
734 put_bits(pb2, 1, 1);
735
736 if(interleaved_stats){
737 s->misc_bits+= get_bits_diff(s);
738 }
739
740 /* motion vectors: 16x8 interlaced mode */
741 h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
742 pred_y /=2;
743
744 put_bits(&s->pb, 1, s->field_select[0][0]);
745 put_bits(&s->pb, 1, s->field_select[0][1]);
746
747 ff_h263_encode_motion_vector(s, s->mv[0][0][0] - pred_x,
748 s->mv[0][0][1] - pred_y, s->f_code);
749 ff_h263_encode_motion_vector(s, s->mv[0][1][0] - pred_x,
750 s->mv[0][1][1] - pred_y, s->f_code);
751 }else{
752 assert(s->mv_type==MV_TYPE_8X8);
753 put_bits(&s->pb,
754 inter_MCBPC_bits[cbpc+16],
755 inter_MCBPC_code[cbpc+16]);
756 put_bits(pb2, cbpy_tab[cbpy][1], cbpy_tab[cbpy][0]);
757
758 if(!s->progressive_sequence){
759 if(cbp)
760 put_bits(pb2, 1, s->interlaced_dct);
761 }
762
763 if(interleaved_stats){
764 s->misc_bits+= get_bits_diff(s);
765 }
766
767 for(i=0; i<4; i++){
768 /* motion vectors: 8x8 mode*/
769 h263_pred_motion(s, i, 0, &pred_x, &pred_y);
770
771 ff_h263_encode_motion_vector(s, s->current_picture.motion_val[0][ s->block_index[i] ][0] - pred_x,
772 s->current_picture.motion_val[0][ s->block_index[i] ][1] - pred_y, s->f_code);
773 }
774 }
775
776 if(interleaved_stats){
777 s->mv_bits+= get_bits_diff(s);
778 }
779
780 mpeg4_encode_blocks(s, block, NULL, NULL, NULL, tex_pb);
781
782 if(interleaved_stats){
783 s->p_tex_bits+= get_bits_diff(s);
784 }
785 s->f_count++;
786 }
787 } else {
788 int cbp;
789 int dc_diff[6]; //dc values with the dc prediction subtracted
790 int dir[6]; //prediction direction
791 int zigzag_last_index[6];
792 uint8_t *scan_table[6];
793 int i;
794
795 for(i=0; i<6; i++){
796 dc_diff[i]= ff_mpeg4_pred_dc(s, i, block[i][0], &dir[i], 1);
797 }
798
799 if(s->flags & CODEC_FLAG_AC_PRED){
800 s->ac_pred= decide_ac_pred(s, block, dir, scan_table, zigzag_last_index);
801 }else{
802 for(i=0; i<6; i++)
803 scan_table[i]= s->intra_scantable.permutated;
804 }
805
806 /* compute cbp */
807 cbp = 0;
808 for (i = 0; i < 6; i++) {
809 if (s->block_last_index[i] >= 1)
810 cbp |= 1 << (5 - i);
811 }
812
813 cbpc = cbp & 3;
814 if (s->pict_type == FF_I_TYPE) {
815 if(s->dquant) cbpc+=4;
816 put_bits(&s->pb,
817 intra_MCBPC_bits[cbpc],
818 intra_MCBPC_code[cbpc]);
819 } else {
820 if(s->dquant) cbpc+=8;
821 put_bits(&s->pb, 1, 0); /* mb coded */
822 put_bits(&s->pb,
823 inter_MCBPC_bits[cbpc + 4],
824 inter_MCBPC_code[cbpc + 4]);
825 }
826 put_bits(pb2, 1, s->ac_pred);
827 cbpy = cbp >> 2;
828 put_bits(pb2, cbpy_tab[cbpy][1], cbpy_tab[cbpy][0]);
829 if(s->dquant)
830 put_bits(dc_pb, 2, dquant_code[s->dquant+2]);
831
832 if(!s->progressive_sequence){
833 put_bits(dc_pb, 1, s->interlaced_dct);
834 }
835
836 if(interleaved_stats){
837 s->misc_bits+= get_bits_diff(s);
838 }
839
840 mpeg4_encode_blocks(s, block, dc_diff, scan_table, dc_pb, tex_pb);
841
842 if(interleaved_stats){
843 s->i_tex_bits+= get_bits_diff(s);
844 }
845 s->i_count++;
846
847 /* restore ac coeffs & last_index stuff if we messed them up with the prediction */
848 if(s->ac_pred)
849 restore_ac_coeffs(s, block, dir, scan_table, zigzag_last_index);
850 }
851}
852
853/**
854 * add mpeg4 stuffing bits (01...1)
855 */
856void ff_mpeg4_stuffing(PutBitContext * pbc)
857{
858 int length;
859 put_bits(pbc, 1, 0);
860 length= (-put_bits_count(pbc))&7;
861 if(length) put_bits(pbc, length, (1<<length)-1);
862}
863
864/* must be called before writing the header */
865void ff_set_mpeg4_time(MpegEncContext * s){
866 if(s->pict_type==FF_B_TYPE){
867 ff_mpeg4_init_direct_mv(s);
868 }else{
869 s->last_time_base= s->time_base;
870 s->time_base= s->time/s->avctx->time_base.den;
871 }
872}
873
874static void mpeg4_encode_gop_header(MpegEncContext * s){
875 int hours, minutes, seconds;
876 int64_t time;
877
878 put_bits(&s->pb, 16, 0);
879 put_bits(&s->pb, 16, GOP_STARTCODE);
880
881 time= s->current_picture_ptr->pts;
882 if(s->reordered_input_picture[1])
883 time= FFMIN(time, s->reordered_input_picture[1]->pts);
884 time= time*s->avctx->time_base.num;
885
886 seconds= time/s->avctx->time_base.den;
887 minutes= seconds/60; seconds %= 60;
888 hours= minutes/60; minutes %= 60;
889 hours%=24;
890
891 put_bits(&s->pb, 5, hours);
892 put_bits(&s->pb, 6, minutes);
893 put_bits(&s->pb, 1, 1);
894 put_bits(&s->pb, 6, seconds);
895
896 put_bits(&s->pb, 1, !!(s->flags&CODEC_FLAG_CLOSED_GOP));
897 put_bits(&s->pb, 1, 0); //broken link == NO
898
899 s->last_time_base= time / s->avctx->time_base.den;
900
901 ff_mpeg4_stuffing(&s->pb);
902}
903
904static void mpeg4_encode_visual_object_header(MpegEncContext * s){
905 int profile_and_level_indication;
906 int vo_ver_id;
907
908 if(s->avctx->profile != FF_PROFILE_UNKNOWN){
909 profile_and_level_indication = s->avctx->profile << 4;
910 }else if(s->max_b_frames || s->quarter_sample){
911 profile_and_level_indication= 0xF0; // adv simple
912 }else{
913 profile_and_level_indication= 0x00; // simple
914 }
915
916 if(s->avctx->level != FF_LEVEL_UNKNOWN){
917 profile_and_level_indication |= s->avctx->level;
918 }else{
919 profile_and_level_indication |= 1; //level 1
920 }
921
922 if(profile_and_level_indication>>4 == 0xF){
923 vo_ver_id= 5;
924 }else{
925 vo_ver_id= 1;
926 }
927
928 //FIXME levels
929
930 put_bits(&s->pb, 16, 0);
931 put_bits(&s->pb, 16, VOS_STARTCODE);
932
933 put_bits(&s->pb, 8, profile_and_level_indication);
934
935 put_bits(&s->pb, 16, 0);
936 put_bits(&s->pb, 16, VISUAL_OBJ_STARTCODE);
937
938 put_bits(&s->pb, 1, 1);
939 put_bits(&s->pb, 4, vo_ver_id);
940 put_bits(&s->pb, 3, 1); //priority
941
942 put_bits(&s->pb, 4, 1); //visual obj type== video obj
943
944 put_bits(&s->pb, 1, 0); //video signal type == no clue //FIXME
945
946 ff_mpeg4_stuffing(&s->pb);
947}
948
949static void mpeg4_encode_vol_header(MpegEncContext * s, int vo_number, int vol_number)
950{
951 int vo_ver_id;
952
953 if (!CONFIG_MPEG4_ENCODER) return;
954
955 if(s->max_b_frames || s->quarter_sample){
956 vo_ver_id= 5;
957 s->vo_type= ADV_SIMPLE_VO_TYPE;
958 }else{
959 vo_ver_id= 1;
960 s->vo_type= SIMPLE_VO_TYPE;
961 }
962
963 put_bits(&s->pb, 16, 0);
964 put_bits(&s->pb, 16, 0x100 + vo_number); /* video obj */
965 put_bits(&s->pb, 16, 0);
966 put_bits(&s->pb, 16, 0x120 + vol_number); /* video obj layer */
967
968 put_bits(&s->pb, 1, 0); /* random access vol */
969 put_bits(&s->pb, 8, s->vo_type); /* video obj type indication */
970 if(s->workaround_bugs & FF_BUG_MS) {
971 put_bits(&s->pb, 1, 0); /* is obj layer id= no */
972 } else {
973 put_bits(&s->pb, 1, 1); /* is obj layer id= yes */
974 put_bits(&s->pb, 4, vo_ver_id); /* is obj layer ver id */
975 put_bits(&s->pb, 3, 1); /* is obj layer priority */
976 }
977
978 s->aspect_ratio_info= ff_h263_aspect_to_info(s->avctx->sample_aspect_ratio);
979
980 put_bits(&s->pb, 4, s->aspect_ratio_info);/* aspect ratio info */
981 if (s->aspect_ratio_info == FF_ASPECT_EXTENDED){
982 put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num);
983 put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den);
984 }
985
986 if(s->workaround_bugs & FF_BUG_MS) { //
987 put_bits(&s->pb, 1, 0); /* vol control parameters= no @@@ */
988 } else {
989 put_bits(&s->pb, 1, 1); /* vol control parameters= yes */
990 put_bits(&s->pb, 2, 1); /* chroma format YUV 420/YV12 */
991 put_bits(&s->pb, 1, s->low_delay);
992 put_bits(&s->pb, 1, 0); /* vbv parameters= no */
993 }
994
995 put_bits(&s->pb, 2, RECT_SHAPE); /* vol shape= rectangle */
996 put_bits(&s->pb, 1, 1); /* marker bit */
997
998 put_bits(&s->pb, 16, s->avctx->time_base.den);
999 if (s->time_increment_bits < 1)
1000 s->time_increment_bits = 1;
1001 put_bits(&s->pb, 1, 1); /* marker bit */
1002 put_bits(&s->pb, 1, 0); /* fixed vop rate=no */
1003 put_bits(&s->pb, 1, 1); /* marker bit */
1004 put_bits(&s->pb, 13, s->width); /* vol width */
1005 put_bits(&s->pb, 1, 1); /* marker bit */
1006 put_bits(&s->pb, 13, s->height); /* vol height */
1007 put_bits(&s->pb, 1, 1); /* marker bit */
1008 put_bits(&s->pb, 1, s->progressive_sequence ? 0 : 1);
1009 put_bits(&s->pb, 1, 1); /* obmc disable */
1010 if (vo_ver_id == 1) {
1011 put_bits(&s->pb, 1, s->vol_sprite_usage); /* sprite enable */
1012 }else{
1013 put_bits(&s->pb, 2, s->vol_sprite_usage); /* sprite enable */
1014 }
1015
1016 put_bits(&s->pb, 1, 0); /* not 8 bit == false */
1017 put_bits(&s->pb, 1, s->mpeg_quant); /* quant type= (0=h263 style)*/
1018
1019 if(s->mpeg_quant){
1020 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
1021 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
1022 }
1023
1024 if (vo_ver_id != 1)
1025 put_bits(&s->pb, 1, s->quarter_sample);
1026 put_bits(&s->pb, 1, 1); /* complexity estimation disable */
1027 s->resync_marker= s->rtp_mode;
1028 put_bits(&s->pb, 1, s->resync_marker ? 0 : 1);/* resync marker disable */
1029 put_bits(&s->pb, 1, s->data_partitioning ? 1 : 0);
1030 if(s->data_partitioning){
1031 put_bits(&s->pb, 1, 0); /* no rvlc */
1032 }
1033
1034 if (vo_ver_id != 1){
1035 put_bits(&s->pb, 1, 0); /* newpred */
1036 put_bits(&s->pb, 1, 0); /* reduced res vop */
1037 }
1038 put_bits(&s->pb, 1, 0); /* scalability */
1039
1040 ff_mpeg4_stuffing(&s->pb);
1041
1042 /* user data */
1043 if(!(s->flags & CODEC_FLAG_BITEXACT)){
1044 put_bits(&s->pb, 16, 0);
1045 put_bits(&s->pb, 16, 0x1B2); /* user_data */
1046 ff_put_string(&s->pb, LIBAVCODEC_IDENT, 0);
1047 }
1048}
1049
1050/* write mpeg4 VOP header */
1051void mpeg4_encode_picture_header(MpegEncContext * s, int picture_number)
1052{
1053 int time_incr;
1054 int time_div, time_mod;
1055
1056 if(s->pict_type==FF_I_TYPE){
1057 if(!(s->flags&CODEC_FLAG_GLOBAL_HEADER)){
1058 if(s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT) //HACK, the reference sw is buggy
1059 mpeg4_encode_visual_object_header(s);
1060 if(s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT || picture_number==0) //HACK, the reference sw is buggy
1061 mpeg4_encode_vol_header(s, 0, 0);
1062 }
1063 if(!(s->workaround_bugs & FF_BUG_MS))
1064 mpeg4_encode_gop_header(s);
1065 }
1066
1067 s->partitioned_frame= s->data_partitioning && s->pict_type!=FF_B_TYPE;
1068
1069 put_bits(&s->pb, 16, 0); /* vop header */
1070 put_bits(&s->pb, 16, VOP_STARTCODE); /* vop header */
1071 put_bits(&s->pb, 2, s->pict_type - 1); /* pict type: I = 0 , P = 1 */
1072
1073 assert(s->time>=0);
1074 time_div= s->time/s->avctx->time_base.den;
1075 time_mod= s->time%s->avctx->time_base.den;
1076 time_incr= time_div - s->last_time_base;
1077 assert(time_incr >= 0);
1078 while(time_incr--)
1079 put_bits(&s->pb, 1, 1);
1080
1081 put_bits(&s->pb, 1, 0);
1082
1083 put_bits(&s->pb, 1, 1); /* marker */
1084 put_bits(&s->pb, s->time_increment_bits, time_mod); /* time increment */
1085 put_bits(&s->pb, 1, 1); /* marker */
1086 put_bits(&s->pb, 1, 1); /* vop coded */
1087 if ( s->pict_type == FF_P_TYPE
1088 || (s->pict_type == FF_S_TYPE && s->vol_sprite_usage==GMC_SPRITE)) {
1089 put_bits(&s->pb, 1, s->no_rounding); /* rounding type */
1090 }
1091 put_bits(&s->pb, 3, 0); /* intra dc VLC threshold */
1092 if(!s->progressive_sequence){
1093 put_bits(&s->pb, 1, s->current_picture_ptr->top_field_first);
1094 put_bits(&s->pb, 1, s->alternate_scan);
1095 }
1096 //FIXME sprite stuff
1097
1098 put_bits(&s->pb, 5, s->qscale);
1099
1100 if (s->pict_type != FF_I_TYPE)
1101 put_bits(&s->pb, 3, s->f_code); /* fcode_for */
1102 if (s->pict_type == FF_B_TYPE)
1103 put_bits(&s->pb, 3, s->b_code); /* fcode_back */
1104}
1105
1106
1107static void init_uni_dc_tab(void)
1108{
1109 int level, uni_code, uni_len;
1110
1111 for(level=-256; level<256; level++){
1112 int size, v, l;
1113 /* find number of bits */
1114 size = 0;
1115 v = abs(level);
1116 while (v) {
1117 v >>= 1;
1118 size++;
1119 }
1120
1121 if (level < 0)
1122 l= (-level) ^ ((1 << size) - 1);
1123 else
1124 l= level;
1125
1126 /* luminance */
1127 uni_code= DCtab_lum[size][0];
1128 uni_len = DCtab_lum[size][1];
1129
1130 if (size > 0) {
1131 uni_code<<=size; uni_code|=l;
1132 uni_len+=size;
1133 if (size > 8){
1134 uni_code<<=1; uni_code|=1;
1135 uni_len++;
1136 }
1137 }
1138 uni_DCtab_lum_bits[level+256]= uni_code;
1139 uni_DCtab_lum_len [level+256]= uni_len;
1140
1141 /* chrominance */
1142 uni_code= DCtab_chrom[size][0];
1143 uni_len = DCtab_chrom[size][1];
1144
1145 if (size > 0) {
1146 uni_code<<=size; uni_code|=l;
1147 uni_len+=size;
1148 if (size > 8){
1149 uni_code<<=1; uni_code|=1;
1150 uni_len++;
1151 }
1152 }
1153 uni_DCtab_chrom_bits[level+256]= uni_code;
1154 uni_DCtab_chrom_len [level+256]= uni_len;
1155
1156 }
1157}
1158
1159static void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab, uint8_t *len_tab){
1160 int slevel, run, last;
1161
1162 assert(MAX_LEVEL >= 64);
1163 assert(MAX_RUN >= 63);
1164
1165 for(slevel=-64; slevel<64; slevel++){
1166 if(slevel==0) continue;
1167 for(run=0; run<64; run++){
1168 for(last=0; last<=1; last++){
1169 const int index= UNI_MPEG4_ENC_INDEX(last, run, slevel+64);
1170 int level= slevel < 0 ? -slevel : slevel;
1171 int sign= slevel < 0 ? 1 : 0;
1172 int bits, len, code;
1173 int level1, run1;
1174
1175 len_tab[index]= 100;
1176
1177 /* ESC0 */
1178 code= get_rl_index(rl, last, run, level);
1179 bits= rl->table_vlc[code][0];
1180 len= rl->table_vlc[code][1];
1181 bits=bits*2+sign; len++;
1182
1183 if(code!=rl->n && len < len_tab[index]){
1184 bits_tab[index]= bits;
1185 len_tab [index]= len;
1186 }
1187 /* ESC1 */
1188 bits= rl->table_vlc[rl->n][0];
1189 len= rl->table_vlc[rl->n][1];
1190 bits=bits*2; len++; //esc1
1191 level1= level - rl->max_level[last][run];
1192 if(level1>0){
1193 code= get_rl_index(rl, last, run, level1);
1194 bits<<= rl->table_vlc[code][1];
1195 len += rl->table_vlc[code][1];
1196 bits += rl->table_vlc[code][0];
1197 bits=bits*2+sign; len++;
1198
1199 if(code!=rl->n && len < len_tab[index]){
1200 bits_tab[index]= bits;
1201 len_tab [index]= len;
1202 }
1203 }
1204 /* ESC2 */
1205 bits= rl->table_vlc[rl->n][0];
1206 len= rl->table_vlc[rl->n][1];
1207 bits=bits*4+2; len+=2; //esc2
1208 run1 = run - rl->max_run[last][level] - 1;
1209 if(run1>=0){
1210 code= get_rl_index(rl, last, run1, level);
1211 bits<<= rl->table_vlc[code][1];
1212 len += rl->table_vlc[code][1];
1213 bits += rl->table_vlc[code][0];
1214 bits=bits*2+sign; len++;
1215
1216 if(code!=rl->n && len < len_tab[index]){
1217 bits_tab[index]= bits;
1218 len_tab [index]= len;
1219 }
1220 }
1221 /* ESC3 */
1222 bits= rl->table_vlc[rl->n][0];
1223 len = rl->table_vlc[rl->n][1];
1224 bits=bits*4+3; len+=2; //esc3
1225 bits=bits*2+last; len++;
1226 bits=bits*64+run; len+=6;
1227 bits=bits*2+1; len++; //marker
1228 bits=bits*4096+(slevel&0xfff); len+=12;
1229 bits=bits*2+1; len++; //marker
1230
1231 if(len < len_tab[index]){
1232 bits_tab[index]= bits;
1233 len_tab [index]= len;
1234 }
1235 }
1236 }
1237 }
1238}
1239
1240static av_cold int encode_init(AVCodecContext *avctx)
1241{
1242 MpegEncContext *s = avctx->priv_data;
1243 int ret;
1244 static int done = 0;
1245
1246 if((ret=MPV_encode_init(avctx)) < 0)
1247 return ret;
1248
1249 if (!done) {
1250 done = 1;
1251
1252 init_uni_dc_tab();
1253
1254 init_rl(&rl_intra, ff_mpeg4_static_rl_table_store[0]);
1255
1256 init_uni_mpeg4_rl_tab(&rl_intra, uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len);
1257 init_uni_mpeg4_rl_tab(&rl_inter, uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len);
1258 }
1259
1260 s->min_qcoeff= -2048;
1261 s->max_qcoeff= 2047;
1262 s->intra_ac_vlc_length = uni_mpeg4_intra_rl_len;
1263 s->intra_ac_vlc_last_length= uni_mpeg4_intra_rl_len + 128*64;
1264 s->inter_ac_vlc_length = uni_mpeg4_inter_rl_len;
1265 s->inter_ac_vlc_last_length= uni_mpeg4_inter_rl_len + 128*64;
1266 s->luma_dc_vlc_length= uni_DCtab_lum_len;
1267 s->chroma_dc_vlc_length= uni_DCtab_chrom_len;
1268 s->ac_esc_length= 7+2+1+6+1+12+1;
1269 s->y_dc_scale_table= ff_mpeg4_y_dc_scale_table;
1270 s->c_dc_scale_table= ff_mpeg4_c_dc_scale_table;
1271
1272 if(s->flags & CODEC_FLAG_GLOBAL_HEADER){
1273
1274 s->avctx->extradata= av_malloc(1024);
1275 init_put_bits(&s->pb, s->avctx->extradata, 1024);
1276
1277 if(!(s->workaround_bugs & FF_BUG_MS))
1278 mpeg4_encode_visual_object_header(s);
1279 mpeg4_encode_vol_header(s, 0, 0);
1280
1281// ff_mpeg4_stuffing(&s->pb); ?
1282 flush_put_bits(&s->pb);
1283 s->avctx->extradata_size= (put_bits_count(&s->pb)+7)>>3;
1284 }
1285 return 0;
1286}
1287
1288void ff_mpeg4_init_partitions(MpegEncContext *s)
1289{
1290 uint8_t *start= put_bits_ptr(&s->pb);
1291 uint8_t *end= s->pb.buf_end;
1292 int size= end - start;
1293 int pb_size = (((intptr_t)start + size/3)&(~3)) - (intptr_t)start;
1294 int tex_size= (size - 2*pb_size)&(~3);
1295
1296 set_put_bits_buffer_size(&s->pb, pb_size);
1297 init_put_bits(&s->tex_pb, start + pb_size , tex_size);
1298 init_put_bits(&s->pb2 , start + pb_size + tex_size, pb_size);
1299}
1300
1301void ff_mpeg4_merge_partitions(MpegEncContext *s)
1302{
1303 const int pb2_len = put_bits_count(&s->pb2 );
1304 const int tex_pb_len= put_bits_count(&s->tex_pb);
1305 const int bits= put_bits_count(&s->pb);
1306
1307 if(s->pict_type==FF_I_TYPE){
1308 put_bits(&s->pb, 19, DC_MARKER);
1309 s->misc_bits+=19 + pb2_len + bits - s->last_bits;
1310 s->i_tex_bits+= tex_pb_len;
1311 }else{
1312 put_bits(&s->pb, 17, MOTION_MARKER);
1313 s->misc_bits+=17 + pb2_len;
1314 s->mv_bits+= bits - s->last_bits;
1315 s->p_tex_bits+= tex_pb_len;
1316 }
1317
1318 flush_put_bits(&s->pb2);
1319 flush_put_bits(&s->tex_pb);
1320
1321 set_put_bits_buffer_size(&s->pb, s->pb2.buf_end - s->pb.buf);
1322 ff_copy_bits(&s->pb, s->pb2.buf , pb2_len);
1323 ff_copy_bits(&s->pb, s->tex_pb.buf, tex_pb_len);
1324 s->last_bits= put_bits_count(&s->pb);
1325}
1326
1327
1328void ff_mpeg4_encode_video_packet_header(MpegEncContext *s)
1329{
1330 int mb_num_bits= av_log2(s->mb_num - 1) + 1;
1331
1332 put_bits(&s->pb, ff_mpeg4_get_video_packet_prefix_length(s), 0);
1333 put_bits(&s->pb, 1, 1);
1334
1335 put_bits(&s->pb, mb_num_bits, s->mb_x + s->mb_y*s->mb_width);
1336 put_bits(&s->pb, s->quant_precision, s->qscale);
1337 put_bits(&s->pb, 1, 0); /* no HEC */
1338}
1339
1340AVCodec mpeg4_encoder = {
1341 "mpeg4",
1342 CODEC_TYPE_VIDEO,
1343 CODEC_ID_MPEG4,
1344 sizeof(MpegEncContext),
1345 encode_init,
1346 MPV_encode_picture,
1347 MPV_encode_end,
1348 .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
1349 .capabilities= CODEC_CAP_DELAY,
1350 .long_name= NULL_IF_CONFIG_SMALL("MPEG-4 part 2"),
1351};