mpeg12: move closed_gop from MpegEncContext to Mpeg1Context
[libav.git] / libavcodec / mpeg4videoenc.c
CommitLineData
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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 *
2912e87a 6 * This file is part of Libav.
ca334dd1 7 *
2912e87a 8 * Libav is free software; you can redistribute it and/or
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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 *
2912e87a 13 * Libav is distributed in the hope that it will be useful,
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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
2912e87a 19 * License along with Libav; if not, write to the Free Software
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20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
4623420d
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23#include "libavutil/log.h"
24#include "libavutil/opt.h"
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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.
32static uint8_t uni_DCtab_lum_len[512];
33static uint8_t uni_DCtab_chrom_len[512];
34static uint16_t uni_DCtab_lum_bits[512];
35static 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.
39static uint32_t uni_mpeg4_intra_rl_bits[64*64*2*2];
40static uint8_t uni_mpeg4_intra_rl_len [64*64*2*2];
41static uint32_t uni_mpeg4_inter_rl_bits[64*64*2*2];
42static 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
48inter
49max level: 24/6
50max run: 53/63
51
52intra
53max level: 53/16
54max run: 29/41
55*/
56
57
58/**
49bd8e4b 59 * Return the number of bits that encoding the 8x8 block in block would need.
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60 * @param[in] block_last_index last index in scantable order that refers to a non zero element in block.
61 */
62static 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
86/**
49bd8e4b 87 * Restore the ac coefficients in block that have been changed by decide_ac_pred().
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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 refering to the last non zero coefficient in zigzag order
93 */
94static 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
117/**
49bd8e4b 118 * Return the optimal value (0 or 1) for the ac_pred element for the given MB in mpeg4.
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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 refering to the last non zero coefficient in zigzag order
124 */
125static 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;
657ccb5a 129 int8_t * const qscale_table = s->current_picture.f.qscale_table;
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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 */
204void ff_clean_mpeg4_qscales(MpegEncContext *s){
205 int i;
657ccb5a 206 int8_t * const qscale_table = s->current_picture.f.qscale_table;
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207
208 ff_clean_h263_qscales(s);
209
975a1447 210 if(s->pict_type== AV_PICTURE_TYPE_B){
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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 * encodes the dc value.
242 * @param n block index (0-3 are luma, 4-5 are chroma)
243 */
244static inline void mpeg4_encode_dc(PutBitContext * s, int level, int n)
245{
246#if 1
49d2d1c3 247 /* DC will overflow if level is outside the [-255,255] range. */
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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 */
05b858b0 268 put_bits(&s->pb, ff_mpeg4_DCtab_lum[size][1], ff_mpeg4_DCtab_lum[size][0]);
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269 } else {
270 /* chrominance */
05b858b0 271 put_bits(&s->pb, ff_mpeg4_DCtab_chrom[size][1], ff_mpeg4_DCtab_chrom[size][0]);
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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
285static 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 * encodes a 8x8 block
295 * @param n block index (0-3 are luma, 4-5 are chroma)
296 */
297static 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;
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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;
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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;
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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;
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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 }
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346}
347
348static 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
399static 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++) {
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//FIXME this is duplicated to h263.c
429static const int dquant_code[5]= {1,0,9,2,3};
430
431void mpeg4_encode_mb(MpegEncContext * s,
432 DCTELEM block[6][64],
433 int motion_x, int motion_y)
434{
435 int cbpc, cbpy, pred_x, pred_y;
436 PutBitContext * const pb2 = s->data_partitioning ? &s->pb2 : &s->pb;
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437 PutBitContext * const tex_pb = s->data_partitioning && s->pict_type!=AV_PICTURE_TYPE_B ? &s->tex_pb : &s->pb;
438 PutBitContext * const dc_pb = s->data_partitioning && s->pict_type!=AV_PICTURE_TYPE_I ? &s->pb2 : &s->pb;
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439 const int interleaved_stats= (s->flags&CODEC_FLAG_PASS1) && !s->data_partitioning ? 1 : 0;
440
441 if (!s->mb_intra) {
442 int i, cbp;
443
975a1447 444 if(s->pict_type==AV_PICTURE_TYPE_B){
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445 static const int mb_type_table[8]= {-1, 3, 2, 1,-1,-1,-1, 0}; /* convert from mv_dir to type */
446 int mb_type= mb_type_table[s->mv_dir];
447
448 if(s->mb_x==0){
449 for(i=0; i<2; i++){
450 s->last_mv[i][0][0]=
451 s->last_mv[i][0][1]=
452 s->last_mv[i][1][0]=
453 s->last_mv[i][1][1]= 0;
454 }
455 }
456
457 assert(s->dquant>=-2 && s->dquant<=2);
458 assert((s->dquant&1)==0);
459 assert(mb_type>=0);
460
461 /* nothing to do if this MB was skipped in the next P Frame */
657ccb5a 462 if (s->next_picture.f.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]) { //FIXME avoid DCT & ...
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463 s->skip_count++;
464 s->mv[0][0][0]=
465 s->mv[0][0][1]=
466 s->mv[1][0][0]=
467 s->mv[1][0][1]= 0;
468 s->mv_dir= MV_DIR_FORWARD; //doesn't matter
469 s->qscale -= s->dquant;
470// s->mb_skipped=1;
471
472 return;
473 }
474
475 cbp= get_b_cbp(s, block, motion_x, motion_y, mb_type);
476
477 if ((cbp | motion_x | motion_y | mb_type) ==0) {
478 /* direct MB with MV={0,0} */
479 assert(s->dquant==0);
480
481 put_bits(&s->pb, 1, 1); /* mb not coded modb1=1 */
482
483 if(interleaved_stats){
484 s->misc_bits++;
485 s->last_bits++;
486 }
487 s->skip_count++;
488 return;
489 }
490
491 put_bits(&s->pb, 1, 0); /* mb coded modb1=0 */
492 put_bits(&s->pb, 1, cbp ? 0 : 1); /* modb2 */ //FIXME merge
493 put_bits(&s->pb, mb_type+1, 1); // this table is so simple that we don't need it :)
494 if(cbp) put_bits(&s->pb, 6, cbp);
495
496 if(cbp && mb_type){
497 if(s->dquant)
498 put_bits(&s->pb, 2, (s->dquant>>2)+3);
499 else
500 put_bits(&s->pb, 1, 0);
501 }else
502 s->qscale -= s->dquant;
503
504 if(!s->progressive_sequence){
505 if(cbp)
506 put_bits(&s->pb, 1, s->interlaced_dct);
507 if(mb_type) // not direct mode
508 put_bits(&s->pb, 1, s->mv_type == MV_TYPE_FIELD);
509 }
510
511 if(interleaved_stats){
512 s->misc_bits+= get_bits_diff(s);
513 }
514
515 if(mb_type == 0){
516 assert(s->mv_dir & MV_DIRECT);
517 ff_h263_encode_motion_vector(s, motion_x, motion_y, 1);
518 s->b_count++;
519 s->f_count++;
520 }else{
521 assert(mb_type > 0 && mb_type < 4);
522 if(s->mv_type != MV_TYPE_FIELD){
523 if(s->mv_dir & MV_DIR_FORWARD){
524 ff_h263_encode_motion_vector(s, s->mv[0][0][0] - s->last_mv[0][0][0],
525 s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
526 s->last_mv[0][0][0]= s->last_mv[0][1][0]= s->mv[0][0][0];
527 s->last_mv[0][0][1]= s->last_mv[0][1][1]= s->mv[0][0][1];
528 s->f_count++;
529 }
530 if(s->mv_dir & MV_DIR_BACKWARD){
531 ff_h263_encode_motion_vector(s, s->mv[1][0][0] - s->last_mv[1][0][0],
532 s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
533 s->last_mv[1][0][0]= s->last_mv[1][1][0]= s->mv[1][0][0];
534 s->last_mv[1][0][1]= s->last_mv[1][1][1]= s->mv[1][0][1];
535 s->b_count++;
536 }
537 }else{
538 if(s->mv_dir & MV_DIR_FORWARD){
539 put_bits(&s->pb, 1, s->field_select[0][0]);
540 put_bits(&s->pb, 1, s->field_select[0][1]);
541 }
542 if(s->mv_dir & MV_DIR_BACKWARD){
543 put_bits(&s->pb, 1, s->field_select[1][0]);
544 put_bits(&s->pb, 1, s->field_select[1][1]);
545 }
546 if(s->mv_dir & MV_DIR_FORWARD){
547 for(i=0; i<2; i++){
548 ff_h263_encode_motion_vector(s, s->mv[0][i][0] - s->last_mv[0][i][0] ,
549 s->mv[0][i][1] - s->last_mv[0][i][1]/2, s->f_code);
550 s->last_mv[0][i][0]= s->mv[0][i][0];
551 s->last_mv[0][i][1]= s->mv[0][i][1]*2;
552 }
553 s->f_count++;
554 }
555 if(s->mv_dir & MV_DIR_BACKWARD){
556 for(i=0; i<2; i++){
557 ff_h263_encode_motion_vector(s, s->mv[1][i][0] - s->last_mv[1][i][0] ,
558 s->mv[1][i][1] - s->last_mv[1][i][1]/2, s->b_code);
559 s->last_mv[1][i][0]= s->mv[1][i][0];
560 s->last_mv[1][i][1]= s->mv[1][i][1]*2;
561 }
562 s->b_count++;
563 }
564 }
565 }
566
567 if(interleaved_stats){
568 s->mv_bits+= get_bits_diff(s);
569 }
570
571 mpeg4_encode_blocks(s, block, NULL, NULL, NULL, &s->pb);
572
573 if(interleaved_stats){
574 s->p_tex_bits+= get_bits_diff(s);
575 }
576
975a1447 577 }else{ /* s->pict_type==AV_PICTURE_TYPE_B */
ca334dd1
MN
578 cbp= get_p_cbp(s, block, motion_x, motion_y);
579
580 if ((cbp | motion_x | motion_y | s->dquant) == 0 && s->mv_type==MV_TYPE_16X16) {
581 /* check if the B frames can skip it too, as we must skip it if we skip here
582 why didn't they just compress the skip-mb bits instead of reusing them ?! */
583 if(s->max_b_frames>0){
584 int i;
585 int x,y, offset;
586 uint8_t *p_pic;
587
588 x= s->mb_x*16;
589 y= s->mb_y*16;
590 if(x+16 > s->width) x= s->width-16;
591 if(y+16 > s->height) y= s->height-16;
592
593 offset= x + y*s->linesize;
657ccb5a 594 p_pic = s->new_picture.f.data[0] + offset;
ca334dd1
MN
595
596 s->mb_skipped=1;
597 for(i=0; i<s->max_b_frames; i++){
598 uint8_t *b_pic;
599 int diff;
600 Picture *pic= s->reordered_input_picture[i+1];
601
657ccb5a
DB
602 if (pic == NULL || pic->f.pict_type != AV_PICTURE_TYPE_B)
603 break;
ca334dd1 604
657ccb5a
DB
605 b_pic = pic->f.data[0] + offset;
606 if (pic->f.type != FF_BUFFER_TYPE_SHARED)
ca334dd1
MN
607 b_pic+= INPLACE_OFFSET;
608 diff= s->dsp.sad[0](NULL, p_pic, b_pic, s->linesize, 16);
609 if(diff>s->qscale*70){ //FIXME check that 70 is optimal
610 s->mb_skipped=0;
611 break;
612 }
613 }
614 }else
615 s->mb_skipped=1;
616
617 if(s->mb_skipped==1){
618 /* skip macroblock */
619 put_bits(&s->pb, 1, 1);
620
621 if(interleaved_stats){
622 s->misc_bits++;
623 s->last_bits++;
624 }
625 s->skip_count++;
626
627 return;
628 }
629 }
630
631 put_bits(&s->pb, 1, 0); /* mb coded */
632 cbpc = cbp & 3;
633 cbpy = cbp >> 2;
634 cbpy ^= 0xf;
635 if(s->mv_type==MV_TYPE_16X16){
636 if(s->dquant) cbpc+= 8;
637 put_bits(&s->pb,
101ada9a
MN
638 ff_h263_inter_MCBPC_bits[cbpc],
639 ff_h263_inter_MCBPC_code[cbpc]);
ca334dd1 640
101ada9a 641 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
ca334dd1
MN
642 if(s->dquant)
643 put_bits(pb2, 2, dquant_code[s->dquant+2]);
644
645 if(!s->progressive_sequence){
646 if(cbp)
647 put_bits(pb2, 1, s->interlaced_dct);
648 put_bits(pb2, 1, 0);
649 }
650
651 if(interleaved_stats){
652 s->misc_bits+= get_bits_diff(s);
653 }
654
655 /* motion vectors: 16x16 mode */
656 h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
657
658 ff_h263_encode_motion_vector(s, motion_x - pred_x,
659 motion_y - pred_y, s->f_code);
660 }else if(s->mv_type==MV_TYPE_FIELD){
661 if(s->dquant) cbpc+= 8;
662 put_bits(&s->pb,
101ada9a
MN
663 ff_h263_inter_MCBPC_bits[cbpc],
664 ff_h263_inter_MCBPC_code[cbpc]);
ca334dd1 665
101ada9a 666 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
ca334dd1
MN
667 if(s->dquant)
668 put_bits(pb2, 2, dquant_code[s->dquant+2]);
669
670 assert(!s->progressive_sequence);
671 if(cbp)
672 put_bits(pb2, 1, s->interlaced_dct);
673 put_bits(pb2, 1, 1);
674
675 if(interleaved_stats){
676 s->misc_bits+= get_bits_diff(s);
677 }
678
679 /* motion vectors: 16x8 interlaced mode */
680 h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
681 pred_y /=2;
682
683 put_bits(&s->pb, 1, s->field_select[0][0]);
684 put_bits(&s->pb, 1, s->field_select[0][1]);
685
686 ff_h263_encode_motion_vector(s, s->mv[0][0][0] - pred_x,
687 s->mv[0][0][1] - pred_y, s->f_code);
688 ff_h263_encode_motion_vector(s, s->mv[0][1][0] - pred_x,
689 s->mv[0][1][1] - pred_y, s->f_code);
690 }else{
691 assert(s->mv_type==MV_TYPE_8X8);
692 put_bits(&s->pb,
101ada9a
MN
693 ff_h263_inter_MCBPC_bits[cbpc+16],
694 ff_h263_inter_MCBPC_code[cbpc+16]);
695 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
ca334dd1
MN
696
697 if(!s->progressive_sequence){
698 if(cbp)
699 put_bits(pb2, 1, s->interlaced_dct);
700 }
701
702 if(interleaved_stats){
703 s->misc_bits+= get_bits_diff(s);
704 }
705
706 for(i=0; i<4; i++){
707 /* motion vectors: 8x8 mode*/
708 h263_pred_motion(s, i, 0, &pred_x, &pred_y);
709
657ccb5a
DB
710 ff_h263_encode_motion_vector(s, s->current_picture.f.motion_val[0][ s->block_index[i] ][0] - pred_x,
711 s->current_picture.f.motion_val[0][ s->block_index[i] ][1] - pred_y, s->f_code);
ca334dd1
MN
712 }
713 }
714
715 if(interleaved_stats){
716 s->mv_bits+= get_bits_diff(s);
717 }
718
719 mpeg4_encode_blocks(s, block, NULL, NULL, NULL, tex_pb);
720
721 if(interleaved_stats){
722 s->p_tex_bits+= get_bits_diff(s);
723 }
724 s->f_count++;
725 }
726 } else {
727 int cbp;
728 int dc_diff[6]; //dc values with the dc prediction subtracted
729 int dir[6]; //prediction direction
730 int zigzag_last_index[6];
731 uint8_t *scan_table[6];
732 int i;
733
734 for(i=0; i<6; i++){
735 dc_diff[i]= ff_mpeg4_pred_dc(s, i, block[i][0], &dir[i], 1);
736 }
737
738 if(s->flags & CODEC_FLAG_AC_PRED){
739 s->ac_pred= decide_ac_pred(s, block, dir, scan_table, zigzag_last_index);
740 }else{
741 for(i=0; i<6; i++)
742 scan_table[i]= s->intra_scantable.permutated;
743 }
744
745 /* compute cbp */
746 cbp = 0;
747 for (i = 0; i < 6; i++) {
748 if (s->block_last_index[i] >= 1)
749 cbp |= 1 << (5 - i);
750 }
751
752 cbpc = cbp & 3;
975a1447 753 if (s->pict_type == AV_PICTURE_TYPE_I) {
ca334dd1
MN
754 if(s->dquant) cbpc+=4;
755 put_bits(&s->pb,
101ada9a
MN
756 ff_h263_intra_MCBPC_bits[cbpc],
757 ff_h263_intra_MCBPC_code[cbpc]);
ca334dd1
MN
758 } else {
759 if(s->dquant) cbpc+=8;
760 put_bits(&s->pb, 1, 0); /* mb coded */
761 put_bits(&s->pb,
101ada9a
MN
762 ff_h263_inter_MCBPC_bits[cbpc + 4],
763 ff_h263_inter_MCBPC_code[cbpc + 4]);
ca334dd1
MN
764 }
765 put_bits(pb2, 1, s->ac_pred);
766 cbpy = cbp >> 2;
101ada9a 767 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
ca334dd1
MN
768 if(s->dquant)
769 put_bits(dc_pb, 2, dquant_code[s->dquant+2]);
770
771 if(!s->progressive_sequence){
772 put_bits(dc_pb, 1, s->interlaced_dct);
773 }
774
775 if(interleaved_stats){
776 s->misc_bits+= get_bits_diff(s);
777 }
778
779 mpeg4_encode_blocks(s, block, dc_diff, scan_table, dc_pb, tex_pb);
780
781 if(interleaved_stats){
782 s->i_tex_bits+= get_bits_diff(s);
783 }
784 s->i_count++;
785
786 /* restore ac coeffs & last_index stuff if we messed them up with the prediction */
787 if(s->ac_pred)
788 restore_ac_coeffs(s, block, dir, scan_table, zigzag_last_index);
789 }
790}
791
792/**
793 * add mpeg4 stuffing bits (01...1)
794 */
795void ff_mpeg4_stuffing(PutBitContext * pbc)
796{
797 int length;
798 put_bits(pbc, 1, 0);
799 length= (-put_bits_count(pbc))&7;
800 if(length) put_bits(pbc, length, (1<<length)-1);
801}
802
803/* must be called before writing the header */
804void ff_set_mpeg4_time(MpegEncContext * s){
975a1447 805 if(s->pict_type==AV_PICTURE_TYPE_B){
ca334dd1
MN
806 ff_mpeg4_init_direct_mv(s);
807 }else{
808 s->last_time_base= s->time_base;
809 s->time_base= s->time/s->avctx->time_base.den;
810 }
811}
812
813static void mpeg4_encode_gop_header(MpegEncContext * s){
814 int hours, minutes, seconds;
815 int64_t time;
816
817 put_bits(&s->pb, 16, 0);
818 put_bits(&s->pb, 16, GOP_STARTCODE);
819
657ccb5a 820 time = s->current_picture_ptr->f.pts;
ca334dd1 821 if(s->reordered_input_picture[1])
657ccb5a 822 time = FFMIN(time, s->reordered_input_picture[1]->f.pts);
ca334dd1
MN
823 time= time*s->avctx->time_base.num;
824
825 seconds= time/s->avctx->time_base.den;
826 minutes= seconds/60; seconds %= 60;
827 hours= minutes/60; minutes %= 60;
828 hours%=24;
829
830 put_bits(&s->pb, 5, hours);
831 put_bits(&s->pb, 6, minutes);
832 put_bits(&s->pb, 1, 1);
833 put_bits(&s->pb, 6, seconds);
834
835 put_bits(&s->pb, 1, !!(s->flags&CODEC_FLAG_CLOSED_GOP));
836 put_bits(&s->pb, 1, 0); //broken link == NO
837
838 s->last_time_base= time / s->avctx->time_base.den;
839
840 ff_mpeg4_stuffing(&s->pb);
841}
842
843static void mpeg4_encode_visual_object_header(MpegEncContext * s){
844 int profile_and_level_indication;
845 int vo_ver_id;
846
847 if(s->avctx->profile != FF_PROFILE_UNKNOWN){
848 profile_and_level_indication = s->avctx->profile << 4;
849 }else if(s->max_b_frames || s->quarter_sample){
850 profile_and_level_indication= 0xF0; // adv simple
851 }else{
852 profile_and_level_indication= 0x00; // simple
853 }
854
855 if(s->avctx->level != FF_LEVEL_UNKNOWN){
856 profile_and_level_indication |= s->avctx->level;
857 }else{
858 profile_and_level_indication |= 1; //level 1
859 }
860
861 if(profile_and_level_indication>>4 == 0xF){
862 vo_ver_id= 5;
863 }else{
864 vo_ver_id= 1;
865 }
866
867 //FIXME levels
868
869 put_bits(&s->pb, 16, 0);
870 put_bits(&s->pb, 16, VOS_STARTCODE);
871
872 put_bits(&s->pb, 8, profile_and_level_indication);
873
874 put_bits(&s->pb, 16, 0);
875 put_bits(&s->pb, 16, VISUAL_OBJ_STARTCODE);
876
877 put_bits(&s->pb, 1, 1);
878 put_bits(&s->pb, 4, vo_ver_id);
879 put_bits(&s->pb, 3, 1); //priority
880
881 put_bits(&s->pb, 4, 1); //visual obj type== video obj
882
883 put_bits(&s->pb, 1, 0); //video signal type == no clue //FIXME
884
885 ff_mpeg4_stuffing(&s->pb);
886}
887
888static void mpeg4_encode_vol_header(MpegEncContext * s, int vo_number, int vol_number)
889{
890 int vo_ver_id;
891
892 if (!CONFIG_MPEG4_ENCODER) return;
893
894 if(s->max_b_frames || s->quarter_sample){
895 vo_ver_id= 5;
896 s->vo_type= ADV_SIMPLE_VO_TYPE;
897 }else{
898 vo_ver_id= 1;
899 s->vo_type= SIMPLE_VO_TYPE;
900 }
901
902 put_bits(&s->pb, 16, 0);
903 put_bits(&s->pb, 16, 0x100 + vo_number); /* video obj */
904 put_bits(&s->pb, 16, 0);
905 put_bits(&s->pb, 16, 0x120 + vol_number); /* video obj layer */
906
907 put_bits(&s->pb, 1, 0); /* random access vol */
908 put_bits(&s->pb, 8, s->vo_type); /* video obj type indication */
909 if(s->workaround_bugs & FF_BUG_MS) {
910 put_bits(&s->pb, 1, 0); /* is obj layer id= no */
911 } else {
912 put_bits(&s->pb, 1, 1); /* is obj layer id= yes */
913 put_bits(&s->pb, 4, vo_ver_id); /* is obj layer ver id */
914 put_bits(&s->pb, 3, 1); /* is obj layer priority */
915 }
916
917 s->aspect_ratio_info= ff_h263_aspect_to_info(s->avctx->sample_aspect_ratio);
918
919 put_bits(&s->pb, 4, s->aspect_ratio_info);/* aspect ratio info */
920 if (s->aspect_ratio_info == FF_ASPECT_EXTENDED){
921 put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num);
922 put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den);
923 }
924
925 if(s->workaround_bugs & FF_BUG_MS) { //
926 put_bits(&s->pb, 1, 0); /* vol control parameters= no @@@ */
927 } else {
928 put_bits(&s->pb, 1, 1); /* vol control parameters= yes */
929 put_bits(&s->pb, 2, 1); /* chroma format YUV 420/YV12 */
930 put_bits(&s->pb, 1, s->low_delay);
931 put_bits(&s->pb, 1, 0); /* vbv parameters= no */
932 }
933
934 put_bits(&s->pb, 2, RECT_SHAPE); /* vol shape= rectangle */
935 put_bits(&s->pb, 1, 1); /* marker bit */
936
937 put_bits(&s->pb, 16, s->avctx->time_base.den);
938 if (s->time_increment_bits < 1)
939 s->time_increment_bits = 1;
940 put_bits(&s->pb, 1, 1); /* marker bit */
941 put_bits(&s->pb, 1, 0); /* fixed vop rate=no */
942 put_bits(&s->pb, 1, 1); /* marker bit */
943 put_bits(&s->pb, 13, s->width); /* vol width */
944 put_bits(&s->pb, 1, 1); /* marker bit */
945 put_bits(&s->pb, 13, s->height); /* vol height */
946 put_bits(&s->pb, 1, 1); /* marker bit */
947 put_bits(&s->pb, 1, s->progressive_sequence ? 0 : 1);
948 put_bits(&s->pb, 1, 1); /* obmc disable */
949 if (vo_ver_id == 1) {
950 put_bits(&s->pb, 1, s->vol_sprite_usage); /* sprite enable */
951 }else{
952 put_bits(&s->pb, 2, s->vol_sprite_usage); /* sprite enable */
953 }
954
955 put_bits(&s->pb, 1, 0); /* not 8 bit == false */
956 put_bits(&s->pb, 1, s->mpeg_quant); /* quant type= (0=h263 style)*/
957
958 if(s->mpeg_quant){
959 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
960 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
961 }
962
963 if (vo_ver_id != 1)
964 put_bits(&s->pb, 1, s->quarter_sample);
965 put_bits(&s->pb, 1, 1); /* complexity estimation disable */
966 s->resync_marker= s->rtp_mode;
967 put_bits(&s->pb, 1, s->resync_marker ? 0 : 1);/* resync marker disable */
968 put_bits(&s->pb, 1, s->data_partitioning ? 1 : 0);
969 if(s->data_partitioning){
970 put_bits(&s->pb, 1, 0); /* no rvlc */
971 }
972
973 if (vo_ver_id != 1){
974 put_bits(&s->pb, 1, 0); /* newpred */
975 put_bits(&s->pb, 1, 0); /* reduced res vop */
976 }
977 put_bits(&s->pb, 1, 0); /* scalability */
978
979 ff_mpeg4_stuffing(&s->pb);
980
981 /* user data */
982 if(!(s->flags & CODEC_FLAG_BITEXACT)){
983 put_bits(&s->pb, 16, 0);
984 put_bits(&s->pb, 16, 0x1B2); /* user_data */
985 ff_put_string(&s->pb, LIBAVCODEC_IDENT, 0);
986 }
987}
988
989/* write mpeg4 VOP header */
990void mpeg4_encode_picture_header(MpegEncContext * s, int picture_number)
991{
992 int time_incr;
993 int time_div, time_mod;
994
975a1447 995 if(s->pict_type==AV_PICTURE_TYPE_I){
ca334dd1
MN
996 if(!(s->flags&CODEC_FLAG_GLOBAL_HEADER)){
997 if(s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT) //HACK, the reference sw is buggy
998 mpeg4_encode_visual_object_header(s);
999 if(s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT || picture_number==0) //HACK, the reference sw is buggy
1000 mpeg4_encode_vol_header(s, 0, 0);
1001 }
1002 if(!(s->workaround_bugs & FF_BUG_MS))
1003 mpeg4_encode_gop_header(s);
1004 }
1005
975a1447 1006 s->partitioned_frame= s->data_partitioning && s->pict_type!=AV_PICTURE_TYPE_B;
ca334dd1
MN
1007
1008 put_bits(&s->pb, 16, 0); /* vop header */
1009 put_bits(&s->pb, 16, VOP_STARTCODE); /* vop header */
1010 put_bits(&s->pb, 2, s->pict_type - 1); /* pict type: I = 0 , P = 1 */
1011
1012 assert(s->time>=0);
1013 time_div= s->time/s->avctx->time_base.den;
1014 time_mod= s->time%s->avctx->time_base.den;
1015 time_incr= time_div - s->last_time_base;
1016 assert(time_incr >= 0);
1017 while(time_incr--)
1018 put_bits(&s->pb, 1, 1);
1019
1020 put_bits(&s->pb, 1, 0);
1021
1022 put_bits(&s->pb, 1, 1); /* marker */
1023 put_bits(&s->pb, s->time_increment_bits, time_mod); /* time increment */
1024 put_bits(&s->pb, 1, 1); /* marker */
1025 put_bits(&s->pb, 1, 1); /* vop coded */
975a1447
SS
1026 if ( s->pict_type == AV_PICTURE_TYPE_P
1027 || (s->pict_type == AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE)) {
ca334dd1
MN
1028 put_bits(&s->pb, 1, s->no_rounding); /* rounding type */
1029 }
1030 put_bits(&s->pb, 3, 0); /* intra dc VLC threshold */
1031 if(!s->progressive_sequence){
657ccb5a 1032 put_bits(&s->pb, 1, s->current_picture_ptr->f.top_field_first);
ca334dd1
MN
1033 put_bits(&s->pb, 1, s->alternate_scan);
1034 }
1035 //FIXME sprite stuff
1036
1037 put_bits(&s->pb, 5, s->qscale);
1038
975a1447 1039 if (s->pict_type != AV_PICTURE_TYPE_I)
ca334dd1 1040 put_bits(&s->pb, 3, s->f_code); /* fcode_for */
975a1447 1041 if (s->pict_type == AV_PICTURE_TYPE_B)
ca334dd1
MN
1042 put_bits(&s->pb, 3, s->b_code); /* fcode_back */
1043}
1044
1045
1046static void init_uni_dc_tab(void)
1047{
1048 int level, uni_code, uni_len;
1049
1050 for(level=-256; level<256; level++){
1051 int size, v, l;
1052 /* find number of bits */
1053 size = 0;
1054 v = abs(level);
1055 while (v) {
1056 v >>= 1;
1057 size++;
1058 }
1059
1060 if (level < 0)
1061 l= (-level) ^ ((1 << size) - 1);
1062 else
1063 l= level;
1064
1065 /* luminance */
05b858b0
MN
1066 uni_code= ff_mpeg4_DCtab_lum[size][0];
1067 uni_len = ff_mpeg4_DCtab_lum[size][1];
ca334dd1
MN
1068
1069 if (size > 0) {
1070 uni_code<<=size; uni_code|=l;
1071 uni_len+=size;
1072 if (size > 8){
1073 uni_code<<=1; uni_code|=1;
1074 uni_len++;
1075 }
1076 }
1077 uni_DCtab_lum_bits[level+256]= uni_code;
1078 uni_DCtab_lum_len [level+256]= uni_len;
1079
1080 /* chrominance */
05b858b0
MN
1081 uni_code= ff_mpeg4_DCtab_chrom[size][0];
1082 uni_len = ff_mpeg4_DCtab_chrom[size][1];
ca334dd1
MN
1083
1084 if (size > 0) {
1085 uni_code<<=size; uni_code|=l;
1086 uni_len+=size;
1087 if (size > 8){
1088 uni_code<<=1; uni_code|=1;
1089 uni_len++;
1090 }
1091 }
1092 uni_DCtab_chrom_bits[level+256]= uni_code;
1093 uni_DCtab_chrom_len [level+256]= uni_len;
1094
1095 }
1096}
1097
1098static void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab, uint8_t *len_tab){
1099 int slevel, run, last;
1100
1101 assert(MAX_LEVEL >= 64);
1102 assert(MAX_RUN >= 63);
1103
1104 for(slevel=-64; slevel<64; slevel++){
1105 if(slevel==0) continue;
1106 for(run=0; run<64; run++){
1107 for(last=0; last<=1; last++){
1108 const int index= UNI_MPEG4_ENC_INDEX(last, run, slevel+64);
1109 int level= slevel < 0 ? -slevel : slevel;
1110 int sign= slevel < 0 ? 1 : 0;
1111 int bits, len, code;
1112 int level1, run1;
1113
1114 len_tab[index]= 100;
1115
1116 /* ESC0 */
1117 code= get_rl_index(rl, last, run, level);
1118 bits= rl->table_vlc[code][0];
1119 len= rl->table_vlc[code][1];
1120 bits=bits*2+sign; len++;
1121
1122 if(code!=rl->n && len < len_tab[index]){
1123 bits_tab[index]= bits;
1124 len_tab [index]= len;
1125 }
1126 /* ESC1 */
1127 bits= rl->table_vlc[rl->n][0];
1128 len= rl->table_vlc[rl->n][1];
1129 bits=bits*2; len++; //esc1
1130 level1= level - rl->max_level[last][run];
1131 if(level1>0){
1132 code= get_rl_index(rl, last, run, level1);
1133 bits<<= rl->table_vlc[code][1];
1134 len += rl->table_vlc[code][1];
1135 bits += rl->table_vlc[code][0];
1136 bits=bits*2+sign; len++;
1137
1138 if(code!=rl->n && len < len_tab[index]){
1139 bits_tab[index]= bits;
1140 len_tab [index]= len;
1141 }
1142 }
1143 /* ESC2 */
1144 bits= rl->table_vlc[rl->n][0];
1145 len= rl->table_vlc[rl->n][1];
1146 bits=bits*4+2; len+=2; //esc2
1147 run1 = run - rl->max_run[last][level] - 1;
1148 if(run1>=0){
1149 code= get_rl_index(rl, last, run1, level);
1150 bits<<= rl->table_vlc[code][1];
1151 len += rl->table_vlc[code][1];
1152 bits += rl->table_vlc[code][0];
1153 bits=bits*2+sign; len++;
1154
1155 if(code!=rl->n && len < len_tab[index]){
1156 bits_tab[index]= bits;
1157 len_tab [index]= len;
1158 }
1159 }
1160 /* ESC3 */
1161 bits= rl->table_vlc[rl->n][0];
1162 len = rl->table_vlc[rl->n][1];
1163 bits=bits*4+3; len+=2; //esc3
1164 bits=bits*2+last; len++;
1165 bits=bits*64+run; len+=6;
1166 bits=bits*2+1; len++; //marker
1167 bits=bits*4096+(slevel&0xfff); len+=12;
1168 bits=bits*2+1; len++; //marker
1169
1170 if(len < len_tab[index]){
1171 bits_tab[index]= bits;
1172 len_tab [index]= len;
1173 }
1174 }
1175 }
1176 }
1177}
1178
1179static av_cold int encode_init(AVCodecContext *avctx)
1180{
1181 MpegEncContext *s = avctx->priv_data;
1182 int ret;
1183 static int done = 0;
1184
1185 if((ret=MPV_encode_init(avctx)) < 0)
1186 return ret;
1187
1188 if (!done) {
1189 done = 1;
1190
1191 init_uni_dc_tab();
1192
fef59a5b 1193 init_rl(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]);
ca334dd1 1194
fef59a5b 1195 init_uni_mpeg4_rl_tab(&ff_mpeg4_rl_intra, uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len);
101ada9a 1196 init_uni_mpeg4_rl_tab(&ff_h263_rl_inter, uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len);
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1197 }
1198
1199 s->min_qcoeff= -2048;
1200 s->max_qcoeff= 2047;
1201 s->intra_ac_vlc_length = uni_mpeg4_intra_rl_len;
1202 s->intra_ac_vlc_last_length= uni_mpeg4_intra_rl_len + 128*64;
1203 s->inter_ac_vlc_length = uni_mpeg4_inter_rl_len;
1204 s->inter_ac_vlc_last_length= uni_mpeg4_inter_rl_len + 128*64;
1205 s->luma_dc_vlc_length= uni_DCtab_lum_len;
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1206 s->ac_esc_length= 7+2+1+6+1+12+1;
1207 s->y_dc_scale_table= ff_mpeg4_y_dc_scale_table;
1208 s->c_dc_scale_table= ff_mpeg4_c_dc_scale_table;
1209
1210 if(s->flags & CODEC_FLAG_GLOBAL_HEADER){
1211
1212 s->avctx->extradata= av_malloc(1024);
1213 init_put_bits(&s->pb, s->avctx->extradata, 1024);
1214
1215 if(!(s->workaround_bugs & FF_BUG_MS))
1216 mpeg4_encode_visual_object_header(s);
1217 mpeg4_encode_vol_header(s, 0, 0);
1218
1219// ff_mpeg4_stuffing(&s->pb); ?
1220 flush_put_bits(&s->pb);
1221 s->avctx->extradata_size= (put_bits_count(&s->pb)+7)>>3;
1222 }
1223 return 0;
1224}
1225
1226void ff_mpeg4_init_partitions(MpegEncContext *s)
1227{
1228 uint8_t *start= put_bits_ptr(&s->pb);
1229 uint8_t *end= s->pb.buf_end;
1230 int size= end - start;
1231 int pb_size = (((intptr_t)start + size/3)&(~3)) - (intptr_t)start;
1232 int tex_size= (size - 2*pb_size)&(~3);
1233
1234 set_put_bits_buffer_size(&s->pb, pb_size);
1235 init_put_bits(&s->tex_pb, start + pb_size , tex_size);
1236 init_put_bits(&s->pb2 , start + pb_size + tex_size, pb_size);
1237}
1238
1239void ff_mpeg4_merge_partitions(MpegEncContext *s)
1240{
1241 const int pb2_len = put_bits_count(&s->pb2 );
1242 const int tex_pb_len= put_bits_count(&s->tex_pb);
1243 const int bits= put_bits_count(&s->pb);
1244
975a1447 1245 if(s->pict_type==AV_PICTURE_TYPE_I){
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1246 put_bits(&s->pb, 19, DC_MARKER);
1247 s->misc_bits+=19 + pb2_len + bits - s->last_bits;
1248 s->i_tex_bits+= tex_pb_len;
1249 }else{
1250 put_bits(&s->pb, 17, MOTION_MARKER);
1251 s->misc_bits+=17 + pb2_len;
1252 s->mv_bits+= bits - s->last_bits;
1253 s->p_tex_bits+= tex_pb_len;
1254 }
1255
1256 flush_put_bits(&s->pb2);
1257 flush_put_bits(&s->tex_pb);
1258
1259 set_put_bits_buffer_size(&s->pb, s->pb2.buf_end - s->pb.buf);
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1260 avpriv_copy_bits(&s->pb, s->pb2.buf , pb2_len);
1261 avpriv_copy_bits(&s->pb, s->tex_pb.buf, tex_pb_len);
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1262 s->last_bits= put_bits_count(&s->pb);
1263}
1264
1265
1266void ff_mpeg4_encode_video_packet_header(MpegEncContext *s)
1267{
1268 int mb_num_bits= av_log2(s->mb_num - 1) + 1;
1269
1270 put_bits(&s->pb, ff_mpeg4_get_video_packet_prefix_length(s), 0);
1271 put_bits(&s->pb, 1, 1);
1272
1273 put_bits(&s->pb, mb_num_bits, s->mb_x + s->mb_y*s->mb_width);
1274 put_bits(&s->pb, s->quant_precision, s->qscale);
1275 put_bits(&s->pb, 1, 0); /* no HEC */
1276}
1277
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1278#define OFFSET(x) offsetof(MpegEncContext, x)
1279#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
1280static const AVOption options[] = {
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1281 { "data_partitioning", "Use data partitioning.", OFFSET(data_partitioning), AV_OPT_TYPE_INT, { 0 }, 0, 1, VE },
1282 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { 0 }, 0, 1, VE },
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1283 { NULL },
1284};
1285
1286static const AVClass mpeg4enc_class = {
1287 .class_name = "MPEG4 encoder",
1288 .item_name = av_default_item_name,
1289 .option = options,
1290 .version = LIBAVUTIL_VERSION_INT,
1291};
1292
d36beb3f 1293AVCodec ff_mpeg4_encoder = {
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1294 .name = "mpeg4",
1295 .type = AVMEDIA_TYPE_VIDEO,
1296 .id = CODEC_ID_MPEG4,
1297 .priv_data_size = sizeof(MpegEncContext),
1298 .init = encode_init,
1299 .encode = MPV_encode_picture,
1300 .close = MPV_encode_end,
ca334dd1 1301 .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
94f7451a 1302 .capabilities= CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
ca334dd1 1303 .long_name= NULL_IF_CONFIG_SMALL("MPEG-4 part 2"),
4623420d 1304 .priv_class = &mpeg4enc_class,
ca334dd1 1305};