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lavc decoders: work with refcounted frames.
[FFMpeg-mirror/mplayer-patches.git] / libavcodec / mpeg4videoenc.c
blobfb4d7a874323a9c9a567705164d324dbe38fef99
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
58 /**
59 * Return the number of bits that encoding the 8x8 block in block would need.
60 * @param[in] block_last_index last index in scantable order that refers to a non zero element in block.
61 */
62 static inline int get_block_rate(MpegEncContext * s, int16_t 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
86 /**
87 * Restore the ac coefficients in block that have been changed by decide_ac_pred().
88 * This function also restores s->block_last_index.
89 * @param[in,out] block MB coefficients, these will be restored
90 * @param[in] dir ac prediction direction for each 8x8 block
91 * @param[out] st scantable for each 8x8 block
92 * @param[in] zigzag_last_index index referring to the last non zero coefficient in zigzag order
93 */
94 static inline void restore_ac_coeffs(MpegEncContext * s, int16_t 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
117 /**
118 * Return the optimal value (0 or 1) for the ac_pred element for the given MB in mpeg4.
119 * This function will also update s->block_last_index and s->ac_val.
120 * @param[in,out] block MB coefficients, these will be updated if 1 is returned
121 * @param[in] dir ac prediction direction for each 8x8 block
122 * @param[out] st scantable for each 8x8 block
123 * @param[out] zigzag_last_index index referring to the last non zero coefficient in zigzag order
124 */
125 static inline int decide_ac_pred(MpegEncContext * s, int16_t 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.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
201 /**
202 * modify mb_type & qscale so that encoding is acually possible in mpeg4
203 */
204 void ff_clean_mpeg4_qscales(MpegEncContext *s){
205 int i;
206 int8_t * const qscale_table = s->current_picture.qscale_table;
207
208 ff_clean_h263_qscales(s);
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
240 /**
241 * Encode the dc value.
242 * @param n block index (0-3 are luma, 4-5 are chroma)
243 */
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 */
254 put_bits(s, uni_DCtab_chrom_len[level], uni_DCtab_chrom_bits[level]);
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
293 /**
294 * Encode an 8x8 block.
295 * @param n block index (0-3 are luma, 4-5 are chroma)
296 */
297 static inline void mpeg4_encode_block(MpegEncContext * s, int16_t * 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, int16_t * 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, int16_t 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++) {
417 skip_put_bits(&s->pb, mpeg4_get_block_length(s, block[i], i, 0, s->intra_scantable.permutated));
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, int16_t block[6][64],
429 int motion_x, int motion_y, int mb_type)
430 {
431 int cbp = 0, i;
432
433 if (s->mpv_flags & FF_MPV_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
471 void ff_mpeg4_encode_mb(MpegEncContext * s,
472 int16_t 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
484 if(s->pict_type==AV_PICTURE_TYPE_B){
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.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->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,
678 ff_h263_inter_MCBPC_bits[cbpc],
679 ff_h263_inter_MCBPC_code[cbpc]);
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,
703 ff_h263_inter_MCBPC_bits[cbpc],
704 ff_h263_inter_MCBPC_code[cbpc]);
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
750 ff_h263_encode_motion_vector(s, s->current_picture.motion_val[0][ s->block_index[i] ][0] - pred_x,
751 s->current_picture.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,
796 ff_h263_intra_MCBPC_bits[cbpc],
797 ff_h263_intra_MCBPC_code[cbpc]);
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
832 /**
833 * add mpeg4 stuffing bits (01...1)
834 */
835 void ff_mpeg4_stuffing(PutBitContext * pbc)
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 */
844 void ff_set_mpeg4_time(MpegEncContext * s){
845 if(s->pict_type==AV_PICTURE_TYPE_B){
846 ff_mpeg4_init_direct_mv(s);
847 }else{
848 s->last_time_base= s->time_base;
849 s->time_base= s->time/s->avctx->time_base.den;
850 }
851 }
852
853 static void mpeg4_encode_gop_header(MpegEncContext * s){
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
883 static void mpeg4_encode_visual_object_header(MpegEncContext * s){
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;
936 s->vo_type= ADV_SIMPLE_VO_TYPE;
937 }else{
938 vo_ver_id= 1;
939 s->vo_type= SIMPLE_VO_TYPE;
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
957 s->aspect_ratio_info= ff_h263_aspect_to_info(s->avctx->sample_aspect_ratio);
958
959 put_bits(&s->pb, 4, s->aspect_ratio_info);/* aspect ratio info */
960 if (s->aspect_ratio_info == FF_ASPECT_EXTENDED){
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){
999 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
1000 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
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 */
1025 avpriv_put_string(&s->pb, LIBAVCODEC_IDENT, 0);
1026 }
1027 }
1028
1029 /* write mpeg4 VOP header */
1030 void ff_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
1038 mpeg4_encode_visual_object_header(s);
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))
1043 mpeg4_encode_gop_header(s);
1044 }
1045
1046 s->partitioned_frame= s->data_partitioning && s->pict_type!=AV_PICTURE_TYPE_B;
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
1067 || (s->pict_type == AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE)) {
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){
1072 put_bits(&s->pb, 1, s->current_picture_ptr->f.top_field_first);
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
1219 static av_cold int encode_init(AVCodecContext *avctx)
1220 {
1221 MpegEncContext *s = avctx->priv_data;
1222 int ret;
1223 static int done = 0;
1224
1225 if((ret=ff_MPV_encode_init(avctx)) < 0)
1226 return ret;
1227
1228 if (!done) {
1229 done = 1;
1230
1231 init_uni_dc_tab();
1232
1233 ff_init_rl(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]);
1234
1235 init_uni_mpeg4_rl_tab(&ff_mpeg4_rl_intra, uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len);
1236 init_uni_mpeg4_rl_tab(&ff_h263_rl_inter, uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len);
1237 }
1238
1239 s->min_qcoeff= -2048;
1240 s->max_qcoeff= 2047;
1241 s->intra_ac_vlc_length = uni_mpeg4_intra_rl_len;
1242 s->intra_ac_vlc_last_length= uni_mpeg4_intra_rl_len + 128*64;
1243 s->inter_ac_vlc_length = uni_mpeg4_inter_rl_len;
1244 s->inter_ac_vlc_last_length= uni_mpeg4_inter_rl_len + 128*64;
1245 s->luma_dc_vlc_length= uni_DCtab_lum_len;
1246 s->ac_esc_length= 7+2+1+6+1+12+1;
1247 s->y_dc_scale_table= ff_mpeg4_y_dc_scale_table;
1248 s->c_dc_scale_table= ff_mpeg4_c_dc_scale_table;
1249
1250 if(s->flags & CODEC_FLAG_GLOBAL_HEADER){
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))
1256 mpeg4_encode_visual_object_header(s);
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
1266 void ff_mpeg4_init_partitions(MpegEncContext *s)
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
1279 void ff_mpeg4_merge_partitions(MpegEncContext *s)
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
1306 void ff_mpeg4_encode_video_packet_header(MpegEncContext *s)
1307 {
1308 int mb_num_bits= av_log2(s->mb_num - 1) + 1;
1309
1310 put_bits(&s->pb, ff_mpeg4_get_video_packet_prefix_length(s), 0);
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, { .i64 = 0 }, 0, 1, VE },
1322 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1323 FF_MPV_COMMON_OPTS
1324 { NULL },
1325 };
1326
1327 static const AVClass mpeg4enc_class = {
1328 .class_name = "MPEG4 encoder",
1329 .item_name = av_default_item_name,
1330 .option = options,
1331 .version = LIBAVUTIL_VERSION_INT,
1332 };
1333
1334 AVCodec ff_mpeg4_encoder = {
1335 .name = "mpeg4",
1336 .type = AVMEDIA_TYPE_VIDEO,
1337 .id = AV_CODEC_ID_MPEG4,
1338 .priv_data_size = sizeof(MpegEncContext),
1339 .init = encode_init,
1340 .encode2 = ff_MPV_encode_picture,
1341 .close = ff_MPV_encode_end,
1342 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
1343 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1344 .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2"),
1345 .priv_class = &mpeg4enc_class,
1346 };
A couple of patches to make building with MPlayer easier