3 * Copyright (c) 2000,2001 Fabrice Bellard
4 * Copyright (c) 2002-2010 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of FFmpeg.
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.
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.
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
23 #include "libavutil/log.h"
24 #include "libavutil/opt.h"
25 #include "mpegvideo.h"
27 #include "mpeg4video.h"
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];
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))
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.
62 static inline int get_block_rate(MpegEncContext * s, DCTELEM block[64], int block_last_index, uint8_t scantable[64]){
67 for(j=1; j<=block_last_index; j++){
68 const int index= scantable[j];
69 int level= block[index];
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)];
76 rate += s->ac_esc_length;
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
94 static inline void restore_ac_coeffs(MpegEncContext * s, DCTELEM block[6][64], const int dir[6], uint8_t *st[6], const int zigzag_last_index[6])
97 memcpy(s->block_last_index, zigzag_last_index, sizeof(int)*6);
100 int16_t *ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
102 st[n]= s->intra_scantable.permutated;
106 block[n][s->dsp.idct_permutation[i ]] = ac_val[i+8];
109 /* left prediction */
111 block[n][s->dsp.idct_permutation[i<<3]]= ac_val[i ];
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
125 static inline int decide_ac_pred(MpegEncContext * s, DCTELEM block[6][64], const int dir[6], uint8_t *st[6], int zigzag_last_index[6])
129 int8_t * const qscale_table = s->current_picture.f.qscale_table;
131 memcpy(zigzag_last_index, s->block_last_index, sizeof(int)*6);
134 int16_t *ac_val, *ac_val1;
136 score -= get_block_rate(s, block[n], s->block_last_index[n], s->intra_scantable.permutated);
138 ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
141 const int xy= s->mb_x + s->mb_y*s->mb_stride - s->mb_stride;
143 ac_val-= s->block_wrap[n]*16;
144 if(s->mb_y==0 || s->qscale == qscale_table[xy] || n==2 || n==3){
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]];
153 /* different qscale, we must rescale */
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]];
161 st[n]= s->intra_h_scantable.permutated;
163 const int xy= s->mb_x-1 + s->mb_y*s->mb_stride;
164 /* left prediction */
166 if(s->mb_x==0 || s->qscale == qscale_table[xy] || n==1 || n==3){
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];
172 ac_val1[i+8]= block[n][s->dsp.idct_permutation[i ]];
175 /* different qscale, we must rescale */
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);
180 ac_val1[i+8]= block[n][s->dsp.idct_permutation[i ]];
183 st[n]= s->intra_v_scantable.permutated;
186 for(i=63; i>0; i--) //FIXME optimize
187 if(block[n][ st[n][i] ]) break;
188 s->block_last_index[n]= i;
190 score += get_block_rate(s, block[n], s->block_last_index[n], st[n]);
196 restore_ac_coeffs(s, block, dir, st, zigzag_last_index);
202 * modify mb_type & qscale so that encoding is actually possible in mpeg4
204 void ff_clean_mpeg4_qscales(MpegEncContext *s){
206 int8_t * const qscale_table = s->current_picture.f.qscale_table;
208 ff_clean_h263_qscales(s);
210 if(s->pict_type== AV_PICTURE_TYPE_B){
212 /* ok, come on, this isn't funny anymore, there's more code for handling this mpeg4 mess than for the actual adaptive quantization */
214 for(i=0; i<s->mb_num; i++){
215 int mb_xy= s->mb_index2xy[i];
216 odd += qscale_table[mb_xy]&1;
219 if(2*odd > s->mb_num) odd=1;
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;
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;
241 * Encode the dc value.
242 * @param n block index (0-3 are luma, 4-5 are chroma)
244 static inline void mpeg4_encode_dc(PutBitContext * s, int level, int n)
247 /* DC will overflow if level is outside the [-255,255] range. */
251 put_bits(s, uni_DCtab_lum_len[level], uni_DCtab_lum_bits[level]);
254 put_bits(s, uni_DCtab_chrom_len[level], uni_DCtab_chrom_bits[level]);
258 /* find number of bits */
268 put_bits(&s->pb, ff_mpeg4_DCtab_lum[size][1], ff_mpeg4_DCtab_lum[size][0]);
271 put_bits(&s->pb, ff_mpeg4_DCtab_chrom[size][1], ff_mpeg4_DCtab_chrom[size][0]);
274 /* encode remaining bits */
277 level = (-level) ^ ((1 << size) - 1);
278 put_bits(&s->pb, size, level);
280 put_bits(&s->pb, 1, 1);
285 static inline int mpeg4_get_dc_length(int level, int n){
287 return uni_DCtab_lum_len[level + 256];
289 return uni_DCtab_chrom_len[level + 256];
294 * Encode an 8x8 block.
295 * @param n block index (0-3 are luma, 4-5 are chroma)
297 static inline void mpeg4_encode_block(MpegEncContext * s, DCTELEM * block, int n, int intra_dc,
298 uint8_t *scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb)
300 int i, last_non_zero;
303 const int last_index = s->block_last_index[n];
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;
310 bits_tab= uni_mpeg4_intra_rl_bits;
311 len_tab = uni_mpeg4_intra_rl_len;
313 if(last_index<0) return;
315 bits_tab= uni_mpeg4_inter_rl_bits;
316 len_tab = uni_mpeg4_inter_rl_len;
320 last_non_zero = i - 1;
321 for (; i < last_index; i++) {
322 int level = block[ scan_table[i] ];
324 int run = i - last_non_zero - 1;
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]);
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);
335 /*if(i<=last_index)*/{
336 int level = block[ scan_table[i] ];
337 int run = i - last_non_zero - 1;
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]);
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);
348 static int mpeg4_get_block_length(MpegEncContext * s, DCTELEM * block, int n, int intra_dc,
351 int i, last_non_zero;
353 const int last_index = s->block_last_index[n];
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;
361 len_tab = uni_mpeg4_intra_rl_len;
363 if(last_index<0) return 0;
365 len_tab = uni_mpeg4_inter_rl_len;
369 last_non_zero = i - 1;
370 for (; i < last_index; i++) {
371 int level = block[ scan_table[i] ];
373 int run = i - last_non_zero - 1;
375 if((level&(~127)) == 0){
376 const int index= UNI_MPEG4_ENC_INDEX(0, run, level);
377 len += len_tab[index];
379 len += 7+2+1+6+1+12+1;
384 /*if(i<=last_index)*/{
385 int level = block[ scan_table[i] ];
386 int run = i - last_non_zero - 1;
388 if((level&(~127)) == 0){
389 const int index= UNI_MPEG4_ENC_INDEX(1, run, level);
390 len += len_tab[index];
392 len += 7+2+1+6+1+12+1;
399 static inline void mpeg4_encode_blocks(MpegEncContext * s, DCTELEM block[6][64], int intra_dc[6],
400 uint8_t **scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb){
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]));
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);
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));
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);
428 static inline int get_b_cbp(MpegEncContext * s, DCTELEM block[6][64],
429 int motion_x, int motion_y, int mb_type)
433 if (s->mpv_flags & FF_MPV_FLAG_CBP_RD) {
435 const int lambda = s->lambda2 >> (FF_LAMBDA_SHIFT - 6);
437 for (i = 0; i < 6; i++)
438 if (s->coded_score[i] < 0) {
439 score += s->coded_score[i];
445 if ((motion_x | motion_y | s->dquant | mb_type) == 0)
446 zero_score -= 4; //2*MV + mb_type + cbp bit
448 zero_score *= lambda;
449 if (zero_score <= score)
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]);
460 for (i = 0; i < 6; i++) {
461 if (s->block_last_index[i] >= 0)
468 //FIXME this is duplicated to h263.c
469 static const int dquant_code[5]= {1,0,9,2,3};
471 void ff_mpeg4_encode_mb(MpegEncContext * s,
472 DCTELEM block[6][64],
473 int motion_x, int motion_y)
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;
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];
493 s->last_mv[i][1][1]= 0;
497 av_assert2(s->dquant>=-2 && s->dquant<=2);
498 av_assert2((s->dquant&1)==0);
499 av_assert2(mb_type>=0);
501 /* nothing to do if this MB was skipped in the next P Frame */
502 if (s->next_picture.f.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]) { //FIXME avoid DCT & ...
508 s->mv_dir= MV_DIR_FORWARD; //doesn't matter
509 s->qscale -= s->dquant;
515 cbp= get_b_cbp(s, block, motion_x, motion_y, mb_type);
517 if ((cbp | motion_x | motion_y | mb_type) ==0) {
518 /* direct MB with MV={0,0} */
519 av_assert2(s->dquant==0);
521 put_bits(&s->pb, 1, 1); /* mb not coded modb1=1 */
523 if(interleaved_stats){
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);
538 put_bits(&s->pb, 2, (s->dquant>>2)+3);
540 put_bits(&s->pb, 1, 0);
542 s->qscale -= s->dquant;
544 if(!s->progressive_sequence){
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);
551 if(interleaved_stats){
552 s->misc_bits+= get_bits_diff(s);
556 av_assert2(s->mv_dir & MV_DIRECT);
557 ff_h263_encode_motion_vector(s, motion_x, motion_y, 1);
561 av_assert2(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];
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];
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]);
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]);
586 if(s->mv_dir & MV_DIR_FORWARD){
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;
595 if(s->mv_dir & MV_DIR_BACKWARD){
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;
607 if(interleaved_stats){
608 s->mv_bits+= get_bits_diff(s);
611 mpeg4_encode_blocks(s, block, NULL, NULL, NULL, &s->pb);
613 if(interleaved_stats){
614 s->p_tex_bits+= get_bits_diff(s);
617 }else{ /* s->pict_type==AV_PICTURE_TYPE_B */
618 cbp= get_p_cbp(s, block, motion_x, motion_y);
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){
631 offset= x + y*s->linesize;
632 p_pic = s->new_picture.f.data[0] + offset;
635 for(i=0; i<s->max_b_frames; i++){
638 Picture *pic= s->reordered_input_picture[i+1];
640 if (pic == NULL || pic->f.pict_type != AV_PICTURE_TYPE_B)
643 b_pic = pic->f.data[0] + offset;
644 if (pic->f.type != FF_BUFFER_TYPE_SHARED)
645 b_pic+= INPLACE_OFFSET;
647 if(x+16 > s->width || y+16 > s->height){
649 int xe= FFMIN(16, s->width - x);
650 int ye= FFMIN(16, s->height- y);
652 for(y1=0; y1<ye; y1++){
653 for(x1=0; x1<xe; x1++){
654 diff+= FFABS(p_pic[x1+y1*s->linesize] - b_pic[x1+y1*s->linesize]);
657 diff= diff*256/(xe*ye);
659 diff= s->dsp.sad[0](NULL, p_pic, b_pic, s->linesize, 16);
661 if(diff>s->qscale*70){ //FIXME check that 70 is optimal
669 if(s->mb_skipped==1){
670 /* skip macroblock */
671 put_bits(&s->pb, 1, 1);
673 if(interleaved_stats){
683 put_bits(&s->pb, 1, 0); /* mb coded */
687 if(s->mv_type==MV_TYPE_16X16){
688 if(s->dquant) cbpc+= 8;
690 ff_h263_inter_MCBPC_bits[cbpc],
691 ff_h263_inter_MCBPC_code[cbpc]);
693 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
695 put_bits(pb2, 2, dquant_code[s->dquant+2]);
697 if(!s->progressive_sequence){
699 put_bits(pb2, 1, s->interlaced_dct);
703 if(interleaved_stats){
704 s->misc_bits+= get_bits_diff(s);
707 /* motion vectors: 16x16 mode */
708 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
710 ff_h263_encode_motion_vector(s, motion_x - pred_x,
711 motion_y - pred_y, s->f_code);
712 }else if(s->mv_type==MV_TYPE_FIELD){
713 if(s->dquant) cbpc+= 8;
715 ff_h263_inter_MCBPC_bits[cbpc],
716 ff_h263_inter_MCBPC_code[cbpc]);
718 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
720 put_bits(pb2, 2, dquant_code[s->dquant+2]);
722 av_assert2(!s->progressive_sequence);
724 put_bits(pb2, 1, s->interlaced_dct);
727 if(interleaved_stats){
728 s->misc_bits+= get_bits_diff(s);
731 /* motion vectors: 16x8 interlaced mode */
732 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
735 put_bits(&s->pb, 1, s->field_select[0][0]);
736 put_bits(&s->pb, 1, s->field_select[0][1]);
738 ff_h263_encode_motion_vector(s, s->mv[0][0][0] - pred_x,
739 s->mv[0][0][1] - pred_y, s->f_code);
740 ff_h263_encode_motion_vector(s, s->mv[0][1][0] - pred_x,
741 s->mv[0][1][1] - pred_y, s->f_code);
743 av_assert2(s->mv_type==MV_TYPE_8X8);
745 ff_h263_inter_MCBPC_bits[cbpc+16],
746 ff_h263_inter_MCBPC_code[cbpc+16]);
747 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
749 if(!s->progressive_sequence){
751 put_bits(pb2, 1, s->interlaced_dct);
754 if(interleaved_stats){
755 s->misc_bits+= get_bits_diff(s);
759 /* motion vectors: 8x8 mode*/
760 ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y);
762 ff_h263_encode_motion_vector(s, s->current_picture.f.motion_val[0][ s->block_index[i] ][0] - pred_x,
763 s->current_picture.f.motion_val[0][ s->block_index[i] ][1] - pred_y, s->f_code);
767 if(interleaved_stats){
768 s->mv_bits+= get_bits_diff(s);
771 mpeg4_encode_blocks(s, block, NULL, NULL, NULL, tex_pb);
773 if(interleaved_stats){
774 s->p_tex_bits+= get_bits_diff(s);
780 int dc_diff[6]; //dc values with the dc prediction subtracted
781 int dir[6]; //prediction direction
782 int zigzag_last_index[6];
783 uint8_t *scan_table[6];
787 dc_diff[i]= ff_mpeg4_pred_dc(s, i, block[i][0], &dir[i], 1);
790 if(s->flags & CODEC_FLAG_AC_PRED){
791 s->ac_pred= decide_ac_pred(s, block, dir, scan_table, zigzag_last_index);
794 scan_table[i]= s->intra_scantable.permutated;
799 for (i = 0; i < 6; i++) {
800 if (s->block_last_index[i] >= 1)
805 if (s->pict_type == AV_PICTURE_TYPE_I) {
806 if(s->dquant) cbpc+=4;
808 ff_h263_intra_MCBPC_bits[cbpc],
809 ff_h263_intra_MCBPC_code[cbpc]);
811 if(s->dquant) cbpc+=8;
812 put_bits(&s->pb, 1, 0); /* mb coded */
814 ff_h263_inter_MCBPC_bits[cbpc + 4],
815 ff_h263_inter_MCBPC_code[cbpc + 4]);
817 put_bits(pb2, 1, s->ac_pred);
819 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
821 put_bits(dc_pb, 2, dquant_code[s->dquant+2]);
823 if(!s->progressive_sequence){
824 put_bits(dc_pb, 1, s->interlaced_dct);
827 if(interleaved_stats){
828 s->misc_bits+= get_bits_diff(s);
831 mpeg4_encode_blocks(s, block, dc_diff, scan_table, dc_pb, tex_pb);
833 if(interleaved_stats){
834 s->i_tex_bits+= get_bits_diff(s);
838 /* restore ac coeffs & last_index stuff if we messed them up with the prediction */
840 restore_ac_coeffs(s, block, dir, scan_table, zigzag_last_index);
845 * add mpeg4 stuffing bits (01...1)
847 void ff_mpeg4_stuffing(PutBitContext * pbc)
851 length= (-put_bits_count(pbc))&7;
852 if(length) put_bits(pbc, length, (1<<length)-1);
855 /* must be called before writing the header */
856 void ff_set_mpeg4_time(MpegEncContext * s){
857 if(s->pict_type==AV_PICTURE_TYPE_B){
858 ff_mpeg4_init_direct_mv(s);
860 s->last_time_base= s->time_base;
861 s->time_base= FFUDIV(s->time, s->avctx->time_base.den);
865 static void mpeg4_encode_gop_header(MpegEncContext * s){
866 int hours, minutes, seconds;
869 put_bits(&s->pb, 16, 0);
870 put_bits(&s->pb, 16, GOP_STARTCODE);
872 time = s->current_picture_ptr->f.pts;
873 if(s->reordered_input_picture[1])
874 time = FFMIN(time, s->reordered_input_picture[1]->f.pts);
875 time= time*s->avctx->time_base.num;
876 s->last_time_base= FFUDIV(time, s->avctx->time_base.den);
878 seconds= FFUDIV(time, s->avctx->time_base.den);
879 minutes= FFUDIV(seconds, 60); seconds = FFUMOD(seconds, 60);
880 hours = FFUDIV(minutes, 60); minutes = FFUMOD(minutes, 60);
881 hours = FFUMOD(hours , 24);
883 put_bits(&s->pb, 5, hours);
884 put_bits(&s->pb, 6, minutes);
885 put_bits(&s->pb, 1, 1);
886 put_bits(&s->pb, 6, seconds);
888 put_bits(&s->pb, 1, !!(s->flags&CODEC_FLAG_CLOSED_GOP));
889 put_bits(&s->pb, 1, 0); //broken link == NO
891 ff_mpeg4_stuffing(&s->pb);
894 static void mpeg4_encode_visual_object_header(MpegEncContext * s){
895 int profile_and_level_indication;
898 if(s->avctx->profile != FF_PROFILE_UNKNOWN){
899 profile_and_level_indication = s->avctx->profile << 4;
900 }else if(s->max_b_frames || s->quarter_sample){
901 profile_and_level_indication= 0xF0; // adv simple
903 profile_and_level_indication= 0x00; // simple
906 if(s->avctx->level != FF_LEVEL_UNKNOWN){
907 profile_and_level_indication |= s->avctx->level;
909 profile_and_level_indication |= 1; //level 1
912 if(profile_and_level_indication>>4 == 0xF){
920 put_bits(&s->pb, 16, 0);
921 put_bits(&s->pb, 16, VOS_STARTCODE);
923 put_bits(&s->pb, 8, profile_and_level_indication);
925 put_bits(&s->pb, 16, 0);
926 put_bits(&s->pb, 16, VISUAL_OBJ_STARTCODE);
928 put_bits(&s->pb, 1, 1);
929 put_bits(&s->pb, 4, vo_ver_id);
930 put_bits(&s->pb, 3, 1); //priority
932 put_bits(&s->pb, 4, 1); //visual obj type== video obj
934 put_bits(&s->pb, 1, 0); //video signal type == no clue //FIXME
936 ff_mpeg4_stuffing(&s->pb);
939 static void mpeg4_encode_vol_header(MpegEncContext * s, int vo_number, int vol_number)
943 if (!CONFIG_MPEG4_ENCODER) return;
945 if(s->max_b_frames || s->quarter_sample){
947 s->vo_type= ADV_SIMPLE_VO_TYPE;
950 s->vo_type= SIMPLE_VO_TYPE;
953 put_bits(&s->pb, 16, 0);
954 put_bits(&s->pb, 16, 0x100 + vo_number); /* video obj */
955 put_bits(&s->pb, 16, 0);
956 put_bits(&s->pb, 16, 0x120 + vol_number); /* video obj layer */
958 put_bits(&s->pb, 1, 0); /* random access vol */
959 put_bits(&s->pb, 8, s->vo_type); /* video obj type indication */
960 if(s->workaround_bugs & FF_BUG_MS) {
961 put_bits(&s->pb, 1, 0); /* is obj layer id= no */
963 put_bits(&s->pb, 1, 1); /* is obj layer id= yes */
964 put_bits(&s->pb, 4, vo_ver_id); /* is obj layer ver id */
965 put_bits(&s->pb, 3, 1); /* is obj layer priority */
968 s->aspect_ratio_info= ff_h263_aspect_to_info(s->avctx->sample_aspect_ratio);
970 put_bits(&s->pb, 4, s->aspect_ratio_info);/* aspect ratio info */
971 if (s->aspect_ratio_info == FF_ASPECT_EXTENDED){
972 av_reduce(&s->avctx->sample_aspect_ratio.num, &s->avctx->sample_aspect_ratio.den,
973 s->avctx->sample_aspect_ratio.num, s->avctx->sample_aspect_ratio.den, 255);
974 put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num);
975 put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den);
978 if(s->workaround_bugs & FF_BUG_MS) { //
979 put_bits(&s->pb, 1, 0); /* vol control parameters= no @@@ */
981 put_bits(&s->pb, 1, 1); /* vol control parameters= yes */
982 put_bits(&s->pb, 2, 1); /* chroma format YUV 420/YV12 */
983 put_bits(&s->pb, 1, s->low_delay);
984 put_bits(&s->pb, 1, 0); /* vbv parameters= no */
987 put_bits(&s->pb, 2, RECT_SHAPE); /* vol shape= rectangle */
988 put_bits(&s->pb, 1, 1); /* marker bit */
990 put_bits(&s->pb, 16, s->avctx->time_base.den);
991 if (s->time_increment_bits < 1)
992 s->time_increment_bits = 1;
993 put_bits(&s->pb, 1, 1); /* marker bit */
994 put_bits(&s->pb, 1, 0); /* fixed vop rate=no */
995 put_bits(&s->pb, 1, 1); /* marker bit */
996 put_bits(&s->pb, 13, s->width); /* vol width */
997 put_bits(&s->pb, 1, 1); /* marker bit */
998 put_bits(&s->pb, 13, s->height); /* vol height */
999 put_bits(&s->pb, 1, 1); /* marker bit */
1000 put_bits(&s->pb, 1, s->progressive_sequence ? 0 : 1);
1001 put_bits(&s->pb, 1, 1); /* obmc disable */
1002 if (vo_ver_id == 1) {
1003 put_bits(&s->pb, 1, s->vol_sprite_usage); /* sprite enable */
1005 put_bits(&s->pb, 2, s->vol_sprite_usage); /* sprite enable */
1008 put_bits(&s->pb, 1, 0); /* not 8 bit == false */
1009 put_bits(&s->pb, 1, s->mpeg_quant); /* quant type= (0=h263 style)*/
1012 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
1013 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
1017 put_bits(&s->pb, 1, s->quarter_sample);
1018 put_bits(&s->pb, 1, 1); /* complexity estimation disable */
1019 s->resync_marker= s->rtp_mode;
1020 put_bits(&s->pb, 1, s->resync_marker ? 0 : 1);/* resync marker disable */
1021 put_bits(&s->pb, 1, s->data_partitioning ? 1 : 0);
1022 if(s->data_partitioning){
1023 put_bits(&s->pb, 1, 0); /* no rvlc */
1026 if (vo_ver_id != 1){
1027 put_bits(&s->pb, 1, 0); /* newpred */
1028 put_bits(&s->pb, 1, 0); /* reduced res vop */
1030 put_bits(&s->pb, 1, 0); /* scalability */
1032 ff_mpeg4_stuffing(&s->pb);
1035 if(!(s->flags & CODEC_FLAG_BITEXACT)){
1036 put_bits(&s->pb, 16, 0);
1037 put_bits(&s->pb, 16, 0x1B2); /* user_data */
1038 avpriv_put_string(&s->pb, LIBAVCODEC_IDENT, 0);
1042 /* write mpeg4 VOP header */
1043 void ff_mpeg4_encode_picture_header(MpegEncContext * s, int picture_number)
1046 int time_div, time_mod;
1048 if(s->pict_type==AV_PICTURE_TYPE_I){
1049 if(!(s->flags&CODEC_FLAG_GLOBAL_HEADER)){
1050 if(s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT) //HACK, the reference sw is buggy
1051 mpeg4_encode_visual_object_header(s);
1052 if(s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT || picture_number==0) //HACK, the reference sw is buggy
1053 mpeg4_encode_vol_header(s, 0, 0);
1055 if(!(s->workaround_bugs & FF_BUG_MS))
1056 mpeg4_encode_gop_header(s);
1059 s->partitioned_frame= s->data_partitioning && s->pict_type!=AV_PICTURE_TYPE_B;
1061 put_bits(&s->pb, 16, 0); /* vop header */
1062 put_bits(&s->pb, 16, VOP_STARTCODE); /* vop header */
1063 put_bits(&s->pb, 2, s->pict_type - 1); /* pict type: I = 0 , P = 1 */
1065 time_div= FFUDIV(s->time, s->avctx->time_base.den);
1066 time_mod= FFUMOD(s->time, s->avctx->time_base.den);
1067 time_incr= time_div - s->last_time_base;
1068 av_assert0(time_incr >= 0);
1070 put_bits(&s->pb, 1, 1);
1072 put_bits(&s->pb, 1, 0);
1074 put_bits(&s->pb, 1, 1); /* marker */
1075 put_bits(&s->pb, s->time_increment_bits, time_mod); /* time increment */
1076 put_bits(&s->pb, 1, 1); /* marker */
1077 put_bits(&s->pb, 1, 1); /* vop coded */
1078 if ( s->pict_type == AV_PICTURE_TYPE_P
1079 || (s->pict_type == AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE)) {
1080 put_bits(&s->pb, 1, s->no_rounding); /* rounding type */
1082 put_bits(&s->pb, 3, 0); /* intra dc VLC threshold */
1083 if(!s->progressive_sequence){
1084 put_bits(&s->pb, 1, s->current_picture_ptr->f.top_field_first);
1085 put_bits(&s->pb, 1, s->alternate_scan);
1087 //FIXME sprite stuff
1089 put_bits(&s->pb, 5, s->qscale);
1091 if (s->pict_type != AV_PICTURE_TYPE_I)
1092 put_bits(&s->pb, 3, s->f_code); /* fcode_for */
1093 if (s->pict_type == AV_PICTURE_TYPE_B)
1094 put_bits(&s->pb, 3, s->b_code); /* fcode_back */
1098 static void init_uni_dc_tab(void)
1100 int level, uni_code, uni_len;
1102 for(level=-256; level<256; level++){
1104 /* find number of bits */
1113 l= (-level) ^ ((1 << size) - 1);
1118 uni_code= ff_mpeg4_DCtab_lum[size][0];
1119 uni_len = ff_mpeg4_DCtab_lum[size][1];
1122 uni_code<<=size; uni_code|=l;
1125 uni_code<<=1; uni_code|=1;
1129 uni_DCtab_lum_bits[level+256]= uni_code;
1130 uni_DCtab_lum_len [level+256]= uni_len;
1133 uni_code= ff_mpeg4_DCtab_chrom[size][0];
1134 uni_len = ff_mpeg4_DCtab_chrom[size][1];
1137 uni_code<<=size; uni_code|=l;
1140 uni_code<<=1; uni_code|=1;
1144 uni_DCtab_chrom_bits[level+256]= uni_code;
1145 uni_DCtab_chrom_len [level+256]= uni_len;
1150 static void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab, uint8_t *len_tab){
1151 int slevel, run, last;
1153 av_assert0(MAX_LEVEL >= 64);
1154 av_assert0(MAX_RUN >= 63);
1156 for(slevel=-64; slevel<64; slevel++){
1157 if(slevel==0) continue;
1158 for(run=0; run<64; run++){
1159 for(last=0; last<=1; last++){
1160 const int index= UNI_MPEG4_ENC_INDEX(last, run, slevel+64);
1161 int level= slevel < 0 ? -slevel : slevel;
1162 int sign= slevel < 0 ? 1 : 0;
1163 int bits, len, code;
1166 len_tab[index]= 100;
1169 code= get_rl_index(rl, last, run, level);
1170 bits= rl->table_vlc[code][0];
1171 len= rl->table_vlc[code][1];
1172 bits=bits*2+sign; len++;
1174 if(code!=rl->n && len < len_tab[index]){
1175 bits_tab[index]= bits;
1176 len_tab [index]= len;
1179 bits= rl->table_vlc[rl->n][0];
1180 len= rl->table_vlc[rl->n][1];
1181 bits=bits*2; len++; //esc1
1182 level1= level - rl->max_level[last][run];
1184 code= get_rl_index(rl, last, run, level1);
1185 bits<<= rl->table_vlc[code][1];
1186 len += rl->table_vlc[code][1];
1187 bits += rl->table_vlc[code][0];
1188 bits=bits*2+sign; len++;
1190 if(code!=rl->n && len < len_tab[index]){
1191 bits_tab[index]= bits;
1192 len_tab [index]= len;
1196 bits= rl->table_vlc[rl->n][0];
1197 len= rl->table_vlc[rl->n][1];
1198 bits=bits*4+2; len+=2; //esc2
1199 run1 = run - rl->max_run[last][level] - 1;
1201 code= get_rl_index(rl, last, run1, level);
1202 bits<<= rl->table_vlc[code][1];
1203 len += rl->table_vlc[code][1];
1204 bits += rl->table_vlc[code][0];
1205 bits=bits*2+sign; len++;
1207 if(code!=rl->n && len < len_tab[index]){
1208 bits_tab[index]= bits;
1209 len_tab [index]= len;
1213 bits= rl->table_vlc[rl->n][0];
1214 len = rl->table_vlc[rl->n][1];
1215 bits=bits*4+3; len+=2; //esc3
1216 bits=bits*2+last; len++;
1217 bits=bits*64+run; len+=6;
1218 bits=bits*2+1; len++; //marker
1219 bits=bits*4096+(slevel&0xfff); len+=12;
1220 bits=bits*2+1; len++; //marker
1222 if(len < len_tab[index]){
1223 bits_tab[index]= bits;
1224 len_tab [index]= len;
1231 static av_cold int encode_init(AVCodecContext *avctx)
1233 MpegEncContext *s = avctx->priv_data;
1235 static int done = 0;
1237 if((ret=ff_MPV_encode_init(avctx)) < 0)
1245 ff_init_rl(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]);
1247 init_uni_mpeg4_rl_tab(&ff_mpeg4_rl_intra, uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len);
1248 init_uni_mpeg4_rl_tab(&ff_h263_rl_inter, uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len);
1251 s->min_qcoeff= -2048;
1252 s->max_qcoeff= 2047;
1253 s->intra_ac_vlc_length = uni_mpeg4_intra_rl_len;
1254 s->intra_ac_vlc_last_length= uni_mpeg4_intra_rl_len + 128*64;
1255 s->inter_ac_vlc_length = uni_mpeg4_inter_rl_len;
1256 s->inter_ac_vlc_last_length= uni_mpeg4_inter_rl_len + 128*64;
1257 s->luma_dc_vlc_length= uni_DCtab_lum_len;
1258 s->ac_esc_length= 7+2+1+6+1+12+1;
1259 s->y_dc_scale_table= ff_mpeg4_y_dc_scale_table;
1260 s->c_dc_scale_table= ff_mpeg4_c_dc_scale_table;
1262 if(s->flags & CODEC_FLAG_GLOBAL_HEADER){
1264 s->avctx->extradata= av_malloc(1024);
1265 init_put_bits(&s->pb, s->avctx->extradata, 1024);
1267 if(!(s->workaround_bugs & FF_BUG_MS))
1268 mpeg4_encode_visual_object_header(s);
1269 mpeg4_encode_vol_header(s, 0, 0);
1271 // ff_mpeg4_stuffing(&s->pb); ?
1272 flush_put_bits(&s->pb);
1273 s->avctx->extradata_size= (put_bits_count(&s->pb)+7)>>3;
1278 void ff_mpeg4_init_partitions(MpegEncContext *s)
1280 uint8_t *start= put_bits_ptr(&s->pb);
1281 uint8_t *end= s->pb.buf_end;
1282 int size= end - start;
1283 int pb_size = (((intptr_t)start + size/3)&(~3)) - (intptr_t)start;
1284 int tex_size= (size - 2*pb_size)&(~3);
1286 set_put_bits_buffer_size(&s->pb, pb_size);
1287 init_put_bits(&s->tex_pb, start + pb_size , tex_size);
1288 init_put_bits(&s->pb2 , start + pb_size + tex_size, pb_size);
1291 void ff_mpeg4_merge_partitions(MpegEncContext *s)
1293 const int pb2_len = put_bits_count(&s->pb2 );
1294 const int tex_pb_len= put_bits_count(&s->tex_pb);
1295 const int bits= put_bits_count(&s->pb);
1297 if(s->pict_type==AV_PICTURE_TYPE_I){
1298 put_bits(&s->pb, 19, DC_MARKER);
1299 s->misc_bits+=19 + pb2_len + bits - s->last_bits;
1300 s->i_tex_bits+= tex_pb_len;
1302 put_bits(&s->pb, 17, MOTION_MARKER);
1303 s->misc_bits+=17 + pb2_len;
1304 s->mv_bits+= bits - s->last_bits;
1305 s->p_tex_bits+= tex_pb_len;
1308 flush_put_bits(&s->pb2);
1309 flush_put_bits(&s->tex_pb);
1311 set_put_bits_buffer_size(&s->pb, s->pb2.buf_end - s->pb.buf);
1312 avpriv_copy_bits(&s->pb, s->pb2.buf , pb2_len);
1313 avpriv_copy_bits(&s->pb, s->tex_pb.buf, tex_pb_len);
1314 s->last_bits= put_bits_count(&s->pb);
1318 void ff_mpeg4_encode_video_packet_header(MpegEncContext *s)
1320 int mb_num_bits= av_log2(s->mb_num - 1) + 1;
1322 put_bits(&s->pb, ff_mpeg4_get_video_packet_prefix_length(s), 0);
1323 put_bits(&s->pb, 1, 1);
1325 put_bits(&s->pb, mb_num_bits, s->mb_x + s->mb_y*s->mb_width);
1326 put_bits(&s->pb, s->quant_precision, s->qscale);
1327 put_bits(&s->pb, 1, 0); /* no HEC */
1330 #define OFFSET(x) offsetof(MpegEncContext, x)
1331 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
1332 static const AVOption options[] = {
1333 { "data_partitioning", "Use data partitioning.", OFFSET(data_partitioning), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1334 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1339 static const AVClass mpeg4enc_class = {
1340 .class_name = "MPEG4 encoder",
1341 .item_name = av_default_item_name,
1343 .version = LIBAVUTIL_VERSION_INT,
1346 AVCodec ff_mpeg4_encoder = {
1348 .type = AVMEDIA_TYPE_VIDEO,
1349 .id = AV_CODEC_ID_MPEG4,
1350 .priv_data_size = sizeof(MpegEncContext),
1351 .init = encode_init,
1352 .encode2 = ff_MPV_encode_picture,
1353 .close = ff_MPV_encode_end,
1354 .pix_fmts = (const enum PixelFormat[]){ PIX_FMT_YUV420P, PIX_FMT_NONE },
1355 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1356 .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2"),
1357 .priv_class = &mpeg4enc_class,